53890031917 has 2 divisors, whose sum is σ = 53890031918. Its totient is φ = 53890031916.

The previous prime is 53890031887. The next prime is 53890031969. The reversal of 53890031917 is 71913009835.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35711172676 + 18178859241 = 188974^2 + 134829^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53890031917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53890041917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26945015958 + 26945015959.

It is an arithmetic number, because the mean of its divisors is an integer number (26945015959).

Almost surely, 2^53890031917 is an apocalyptic number.

It is an amenable number.

53890031917 is a deficient number, since it is larger than the sum of its proper divisors (1).

53890031917 is an equidigital number, since it uses as much as digits as its factorization.

53890031917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 46.

The spelling of 53890031917 in words is "fifty-three billion, eight hundred ninety million, thirty-one thousand, nine hundred seventeen".