931418385661 has 2 divisors, whose sum is σ = 931418385662. Its totient is φ = 931418385660.

The previous prime is 931418385659. The next prime is 931418385679. The reversal of 931418385661 is 166583814139.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 672103192761 + 259315192900 = 819819^2 + 509230^2 .

It is a cyclic number.

It is not a de Polignac number, because 931418385661 - 2¹ = 931418385659 is a prime.

Together with 931418385659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (931418385691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 465709192830 + 465709192831.

It is an arithmetic number, because the mean of its divisors is an integer number (465709192831).

Almost surely, 2^931418385661 is an apocalyptic number.

It is an amenable number.

931418385661 is a deficient number, since it is larger than the sum of its proper divisors (1).

931418385661 is an equidigital number, since it uses as much as digits as its factorization.

931418385661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3732480, while the sum is 55.

The spelling of 931418385661 in words is "nine hundred thirty-one billion, four hundred eighteen million, three hundred eighty-five thousand, six hundred sixty-one".