3997094991 has 8 divisors (see below), whose sum is σ = 5330273280. Its totient is φ = 2664323352.

The previous prime is 3997094987. The next prime is 3997095017. The reversal of 3997094991 is 1994907993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3997094991 - 2² = 3997094987 is a prime.

It is a Smith number, since the sum of its digits (60) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3997090991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77935 + ... + 118608.

It is an arithmetic number, because the mean of its divisors is an integer number (666284160).

Almost surely, 2^3997094991 is an apocalyptic number.

3997094991 is a deficient number, since it is larger than the sum of its proper divisors (1333178289).

3997094991 is a wasteful number, since it uses less digits than its factorization.

3997094991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203325.

The product of its (nonzero) digits is 4960116, while the sum is 60.

The square root of 3997094991 is about 63222.5829193968. The cubic root of 3997094991 is about 1587.0166743729.

The spelling of 3997094991 in words is "three billion, nine hundred ninety-seven million, ninety-four thousand, nine hundred ninety-one".