31678693933 has 2 divisors, whose sum is σ = 31678693934. Its totient is φ = 31678693932.

The previous prime is 31678693897. The next prime is 31678693957. The reversal of 31678693933 is 33939687613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29672818564 + 2005875369 = 172258^2 + 44787^2 .

It is a cyclic number.

It is not a de Polignac number, because 31678693933 - 2⁹ = 31678693421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31678699933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15839346966 + 15839346967.

It is an arithmetic number, because the mean of its divisors is an integer number (15839346967).

Almost surely, 2^31678693933 is an apocalyptic number.

It is an amenable number.

31678693933 is a deficient number, since it is larger than the sum of its proper divisors (1).

31678693933 is an equidigital number, since it uses as much as digits as its factorization.

31678693933 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 58.

The spelling of 31678693933 in words is "thirty-one billion, six hundred seventy-eight million, six hundred ninety-three thousand, nine hundred thirty-three".