31230959 has 2 divisors, whose sum is σ = 31230960. Its totient is φ = 31230958.

The previous prime is 31230929. The next prime is 31230961. The reversal of 31230959 is 95903213.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31230959 is a prime.

Together with 31230961, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31230929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615479 + 15615480.

It is an arithmetic number, because the mean of its divisors is an integer number (15615480).

Almost surely, 2^31230959 is an apocalyptic number.

31230959 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230959 is an equidigital number, since it uses as much as digits as its factorization.

31230959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7290, while the sum is 32.

The square root of 31230959 is about 5588.4666054294. The cubic root of 31230959 is about 314.9162757248.

The spelling of 31230959 in words is "thirty-one million, two hundred thirty thousand, nine hundred fifty-nine".