2389698991 has 4 divisors (see below), whose sum is σ = 2390058184. Its totient is φ = 2389339800.

The previous prime is 2389698967. The next prime is 2389699001. The reversal of 2389698991 is 1998969832.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2389698991 - 2¹⁷ = 2389567919 is a prime.

It is a super-2 number, since 2×2389698991² = 11421322535172836162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2389698911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169425 + ... + 182986.

It is an arithmetic number, because the mean of its divisors is an integer number (597514546).

Almost surely, 2^2389698991 is an apocalyptic number.

2389698991 is a deficient number, since it is larger than the sum of its proper divisors (359193).

2389698991 is an equidigital number, since it uses as much as digits as its factorization.

2389698991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359192.

The product of its digits is 15116544, while the sum is 64.

The square root of 2389698991 is about 48884.5475687359. The cubic root of 2389698991 is about 1336.9476434206.

The spelling of 2389698991 in words is "two billion, three hundred eighty-nine million, six hundred ninety-eight thousand, nine hundred ninety-one".