391552955 has 8 divisors (see below), whose sum is σ = 474425952. Its totient is φ = 310200768.

The previous prime is 391552939. The next prime is 391552963. The reversal of 391552955 is 559255193.

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

It is a cyclic number.

It is not a de Polignac number, because 391552955 - 2⁴ = 391552939 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 379634 + ... + 380663.

It is an arithmetic number, because the mean of its divisors is an integer number (59303244).

Almost surely, 2^391552955 is an apocalyptic number.

391552955 is a deficient number, since it is larger than the sum of its proper divisors (82872997).

391552955 is a wasteful number, since it uses less digits than its factorization.

391552955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760405.

The product of its digits is 303750, while the sum is 44.

The square root of 391552955 is about 19787.6970615582. The cubic root of 391552955 is about 731.5828262602.

The spelling of 391552955 in words is "three hundred ninety-one million, five hundred fifty-two thousand, nine hundred fifty-five".