531901913 has 2 divisors, whose sum is σ = 531901914. Its totient is φ = 531901912.

The previous prime is 531901891. The next prime is 531901919. The reversal of 531901913 is 319109135.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 300953104 + 230948809 = 17348^2 + 15197^2 .

It is a cyclic number.

It is not a de Polignac number, because 531901913 - 2¹⁶ = 531836377 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 531901913.

It is not a weakly prime, because it can be changed into another prime (531901919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265950956 + 265950957.

It is an arithmetic number, because the mean of its divisors is an integer number (265950957).

Almost surely, 2^531901913 is an apocalyptic number.

It is an amenable number.

531901913 is a deficient number, since it is larger than the sum of its proper divisors (1).

531901913 is an equidigital number, since it uses as much as digits as its factorization.

531901913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3645, while the sum is 32.

The square root of 531901913 is about 23062.9987859341. The cubic root of 531901913 is about 810.2341003993.

The spelling of 531901913 in words is "five hundred thirty-one million, nine hundred one thousand, nine hundred thirteen".