1993630078631 has 2 divisors, whose sum is σ = 1993630078632. Its totient is φ = 1993630078630.

The previous prime is 1993630078579. The next prime is 1993630078717. The reversal of 1993630078631 is 1368700363991.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (1368700363991) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1993630078631 is a prime.

It is a super-2 number, since 2×1993630078631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1993630078031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 996815039315 + 996815039316.

It is an arithmetic number, because the mean of its divisors is an integer number (996815039316).

Almost surely, 2^{1993630078631} is an apocalyptic number.

1993630078631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1993630078631 is an equidigital number, since it uses as much as digits as its factorization.

1993630078631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4408992, while the sum is 56.

The spelling of 1993630078631 in words is "one trillion, nine hundred ninety-three billion, six hundred thirty million, seventy-eight thousand, six hundred thirty-one".