913731823661 has 2 divisors, whose sum is σ = 913731823662. Its totient is φ = 913731823660.

The previous prime is 913731823619. The next prime is 913731823673. The reversal of 913731823661 is 166328137319.

913731823661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 852824545225 + 60907278436 = 923485^2 + 246794^2 .

It is a cyclic number.

It is not a de Polignac number, because 913731823661 - 2¹⁸ = 913731561517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (913731823691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 456865911830 + 456865911831.

It is an arithmetic number, because the mean of its divisors is an integer number (456865911831).

Almost surely, 2^913731823661 is an apocalyptic number.

It is an amenable number.

913731823661 is a deficient number, since it is larger than the sum of its proper divisors (1).

913731823661 is an equidigital number, since it uses as much as digits as its factorization.

913731823661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 979776, while the sum is 50.

The spelling of 913731823661 in words is "nine hundred thirteen billion, seven hundred thirty-one million, eight hundred twenty-three thousand, six hundred sixty-one".