531399079 has 2 divisors, whose sum is σ = 531399080. Its totient is φ = 531399078.

The previous prime is 531399023. The next prime is 531399131. The reversal of 531399079 is 970993135.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 531399079 - 2²⁵ = 497844647 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (531399019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265699539 + 265699540.

It is an arithmetic number, because the mean of its divisors is an integer number (265699540).

Almost surely, 2^531399079 is an apocalyptic number.

531399079 is a deficient number, since it is larger than the sum of its proper divisors (1).

531399079 is an equidigital number, since it uses as much as digits as its factorization.

531399079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 229635, while the sum is 46.

The square root of 531399079 is about 23052.0948939570. The cubic root of 531399079 is about 809.9787013655.

The spelling of 531399079 in words is "five hundred thirty-one million, three hundred ninety-nine thousand, seventy-nine".