531379639 has 16 divisors (see below), whose sum is σ = 623085120. Its totient is φ = 443658240.

The previous prime is 531379637. The next prime is 531379661. The reversal of 531379639 is 936973135.

It is a cyclic number.

It is not a de Polignac number, because 531379639 - 2¹ = 531379637 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (531379637) 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 15 ways as a sum of consecutive naturals, for example, 265627 + ... + 267619.

It is an arithmetic number, because the mean of its divisors is an integer number (38942820).

Almost surely, 2^531379639 is an apocalyptic number.

531379639 is a deficient number, since it is larger than the sum of its proper divisors (91705481).

531379639 is a wasteful number, since it uses less digits than its factorization.

531379639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2970.

The product of its digits is 459270, while the sum is 46.

The square root of 531379639 is about 23051.6732364486. The cubic root of 531379639 is about 809.9688241824.

The spelling of 531379639 in words is "five hundred thirty-one million, three hundred seventy-nine thousand, six hundred thirty-nine".