531090386879 has 32 divisors (see below), whose sum is σ = 586505586240. Its totient is φ = 477902241792.

The previous prime is 531090386873. The next prime is 531090386891. The reversal of 531090386879 is 978683090135.

It is a cyclic number.

It is not a de Polignac number, because 531090386879 - 2⁴ = 531090386863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (59).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531090386873) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 127879067 + ... + 127883219.

It is an arithmetic number, because the mean of its divisors is an integer number (18328299570).

Almost surely, 2^531090386879 is an apocalyptic number.

531090386879 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

531090386879 is a deficient number, since it is larger than the sum of its proper divisors (55415199361).

531090386879 is a wasteful number, since it uses less digits than its factorization.

531090386879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5579.

The product of its (nonzero) digits is 9797760, while the sum is 59.

The spelling of 531090386879 in words is "five hundred thirty-one billion, ninety million, three hundred eighty-six thousand, eight hundred seventy-nine".