231953903479 has 2 divisors, whose sum is σ = 231953903480. Its totient is φ = 231953903478.

The previous prime is 231953903459. The next prime is 231953903507. The reversal of 231953903479 is 974309359132.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231953903479 is a prime.

It is a super-2 number, since 2×231953903479² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231953903459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115976951739 + 115976951740.

It is an arithmetic number, because the mean of its divisors is an integer number (115976951740).

Almost surely, 2^231953903479 is an apocalyptic number.

231953903479 is a deficient number, since it is larger than the sum of its proper divisors (1).

231953903479 is an equidigital number, since it uses as much as digits as its factorization.

231953903479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5511240, while the sum is 55.

The spelling of 231953903479 in words is "two hundred thirty-one billion, nine hundred fifty-three million, nine hundred three thousand, four hundred seventy-nine".