31234342397 has 2 divisors, whose sum is σ = 31234342398. Its totient is φ = 31234342396.

The previous prime is 31234342379. The next prime is 31234342411. The reversal of 31234342397 is 79324343213.

Together with previous prime (31234342379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30159879556 + 1074462841 = 173666^2 + 32779^2 .

It is a cyclic number.

It is not a de Polignac number, because 31234342397 - 2⁸ = 31234342141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31234342357) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15617171198 + 15617171199.

It is an arithmetic number, because the mean of its divisors is an integer number (15617171199).

Almost surely, 2^31234342397 is an apocalyptic number.

It is an amenable number.

31234342397 is a deficient number, since it is larger than the sum of its proper divisors (1).

31234342397 is an equidigital number, since it uses as much as digits as its factorization.

31234342397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 41.

The spelling of 31234342397 in words is "thirty-one billion, two hundred thirty-four million, three hundred forty-two thousand, three hundred ninety-seven".