31223909068687 has 2 divisors, whose sum is σ = 31223909068688. Its totient is φ = 31223909068686.

The previous prime is 31223909068669. The next prime is 31223909068727. The reversal of 31223909068687 is 78686090932213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31223909068687 - 2⁷ = 31223909068559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31223909068657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15611954534343 + 15611954534344.

It is an arithmetic number, because the mean of its divisors is an integer number (15611954534344).

Almost surely, 2^{31223909068687} is an apocalyptic number.

31223909068687 is a deficient number, since it is larger than the sum of its proper divisors (1).

31223909068687 is an equidigital number, since it uses as much as digits as its factorization.

31223909068687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47029248, while the sum is 64.

The spelling of 31223909068687 in words is "thirty-one trillion, two hundred twenty-three billion, nine hundred nine million, sixty-eight thousand, six hundred eighty-seven".