14978623117 has 2 divisors, whose sum is σ = 14978623118. Its totient is φ = 14978623116.

The previous prime is 14978623081. The next prime is 14978623141. The reversal of 14978623117 is 71132687941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14749130916 + 229492201 = 121446^2 + 15149^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-14978623117 is a prime.

It is a super-2 number, since 2×14978623117² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14978623147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7489311558 + 7489311559.

It is an arithmetic number, because the mean of its divisors is an integer number (7489311559).

Almost surely, 2^14978623117 is an apocalyptic number.

It is an amenable number.

14978623117 is a deficient number, since it is larger than the sum of its proper divisors (1).

14978623117 is an equidigital number, since it uses as much as digits as its factorization.

14978623117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 49.

The spelling of 14978623117 in words is "fourteen billion, nine hundred seventy-eight million, six hundred twenty-three thousand, one hundred seventeen".