31321234669 has 2 divisors, whose sum is σ = 31321234670. Its totient is φ = 31321234668.

The previous prime is 31321234667. The next prime is 31321234751. The reversal of 31321234669 is 96643212313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15778625769 + 15542608900 = 125613^2 + 124670^2 .

It is a cyclic number.

It is not a de Polignac number, because 31321234669 - 2¹ = 31321234667 is a prime.

It is a super-2 number, since 2×31321234669² (a number of 22 digits) contains 22 as substring.

Together with 31321234667, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31321234663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660617334 + 15660617335.

It is an arithmetic number, because the mean of its divisors is an integer number (15660617335).

Almost surely, 2^31321234669 is an apocalyptic number.

It is an amenable number.

31321234669 is a deficient number, since it is larger than the sum of its proper divisors (1).

31321234669 is an equidigital number, since it uses as much as digits as its factorization.

31321234669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 139968, while the sum is 40.

The spelling of 31321234669 in words is "thirty-one billion, three hundred twenty-one million, two hundred thirty-four thousand, six hundred sixty-nine".