3997098581 has 4 divisors (see below), whose sum is σ = 4568112672. Its totient is φ = 3426084492.

The previous prime is 3997098557. The next prime is 3997098587. The reversal of 3997098581 is 1858907993.

3997098581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3997098581 - 2²⁶ = 3929989717 is a prime.

It is a super-2 number, since 2×3997098581² = 31953594132464427122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 3997098581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997098587) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 285507035 + ... + 285507048.

It is an arithmetic number, because the mean of its divisors is an integer number (1142028168).

Almost surely, 2^3997098581 is an apocalyptic number.

It is an amenable number.

3997098581 is a deficient number, since it is larger than the sum of its proper divisors (571014091).

3997098581 is an equidigital number, since it uses as much as digits as its factorization.

3997098581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571014090.

The product of its (nonzero) digits is 4898880, while the sum is 59.

The square root of 3997098581 is about 63222.6113111441. The cubic root of 3997098581 is about 1587.0171495003.

The spelling of 3997098581 in words is "three billion, nine hundred ninety-seven million, ninety-eight thousand, five hundred eighty-one".