391554045 has 24 divisors (see below), whose sum is σ = 682770816. Its totient is φ = 207574368.

The previous prime is 391554043. The next prime is 391554049. The reversal of 391554045 is 540455193.

It is not a de Polignac number, because 391554045 - 2¹ = 391554043 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (391554043) 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 23 ways as a sum of consecutive naturals, for example, 18537 + ... + 33566.

It is an arithmetic number, because the mean of its divisors is an integer number (28448784).

Almost surely, 2^391554045 is an apocalyptic number.

It is an amenable number.

391554045 is a deficient number, since it is larger than the sum of its proper divisors (291216771).

391554045 is a wasteful number, since it uses less digits than its factorization.

391554045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52281 (or 52278 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The square root of 391554045 is about 19787.7246039053. The cubic root of 391554045 is about 731.5835051164.

The spelling of 391554045 in words is "three hundred ninety-one million, five hundred fifty-four thousand, forty-five".