391104081 has 24 divisors (see below), whose sum is σ = 573842880. Its totient is φ = 256653216.

The previous prime is 391104079. The next prime is 391104083. The reversal of 391104081 is 180401193.

It is an interprime number because it is at equal distance from previous prime (391104079) and next prime (391104083).

It is not a de Polignac number, because 391104081 - 2¹ = 391104079 is a prime.

It is a super-2 number, since 2×391104081² = 305924804349709122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (391104083) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 164755 + ... + 167111.

It is an arithmetic number, because the mean of its divisors is an integer number (23910120).

Almost surely, 2^391104081 is an apocalyptic number.

It is an amenable number.

391104081 is a deficient number, since it is larger than the sum of its proper divisors (182738799).

391104081 is a wasteful number, since it uses less digits than its factorization.

391104081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645 (or 2642 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 391104081 is about 19776.3515593752. The cubic root of 391104081 is about 731.3031586163.

The spelling of 391104081 in words is "three hundred ninety-one million, one hundred four thousand, eighty-one".