31742907887 has 2 divisors, whose sum is σ = 31742907888. Its totient is φ = 31742907886.

The previous prime is 31742907811. The next prime is 31742907907. The reversal of 31742907887 is 78870924713.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31742907887 - 2¹² = 31742903791 is a prime.

It is a super-2 number, since 2×31742907887² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31742907187) 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, 15871453943 + 15871453944.

It is an arithmetic number, because the mean of its divisors is an integer number (15871453944).

Almost surely, 2^31742907887 is an apocalyptic number.

31742907887 is a deficient number, since it is larger than the sum of its proper divisors (1).

31742907887 is an equidigital number, since it uses as much as digits as its factorization.

31742907887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4741632, while the sum is 56.

The spelling of 31742907887 in words is "thirty-one billion, seven hundred forty-two million, nine hundred seven thousand, eight hundred eighty-seven".