390105431 has 4 divisors (see below), whose sum is σ = 396500664. Its totient is φ = 383710200.

The previous prime is 390105403. The next prime is 390105433. The reversal of 390105431 is 134501093.

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 390105431 - 2⁶ = 390105367 is a prime.

It is a super-3 number, since 3×390105431³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 390105431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (390105433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3197525 + ... + 3197646.

It is an arithmetic number, because the mean of its divisors is an integer number (99125166).

Almost surely, 2^390105431 is an apocalyptic number.

390105431 is a deficient number, since it is larger than the sum of its proper divisors (6395233).

390105431 is an equidigital number, since it uses as much as digits as its factorization.

390105431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6395232.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 390105431 is about 19751.0868308557. The cubic root of 390105431 is about 730.6801885705.

The spelling of 390105431 in words is "three hundred ninety million, one hundred five thousand, four hundred thirty-one".