531940889 has 2 divisors, whose sum is σ = 531940890. Its totient is φ = 531940888.

The previous prime is 531940879. The next prime is 531940943. The reversal of 531940889 is 988049135.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 449440000 + 82500889 = 21200^2 + 9083^2 .

It is a cyclic number.

It is not a de Polignac number, because 531940889 - 2¹² = 531936793 is a prime.

It is a super-2 number, since 2×531940889² = 565922218780220642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (531940859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265970444 + 265970445.

It is an arithmetic number, because the mean of its divisors is an integer number (265970445).

Almost surely, 2^531940889 is an apocalyptic number.

It is an amenable number.

531940889 is a deficient number, since it is larger than the sum of its proper divisors (1).

531940889 is an equidigital number, since it uses as much as digits as its factorization.

531940889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 531940889 is about 23063.8437603102. The cubic root of 531940889 is about 810.2538903343.

The spelling of 531940889 in words is "five hundred thirty-one million, nine hundred forty thousand, eight hundred eighty-nine".