117438953477 has 2 divisors, whose sum is σ = 117438953478. Its totient is φ = 117438953476.

The previous prime is 117438953459. The next prime is 117438953497. The reversal of 117438953477 is 774359834711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80338800481 + 37100152996 = 283441^2 + 192614^2 .

It is a cyclic number.

It is not a de Polignac number, because 117438953477 - 2²⁶ = 117371844613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117438953497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58719476738 + 58719476739.

It is an arithmetic number, because the mean of its divisors is an integer number (58719476739).

Almost surely, 2^117438953477 is an apocalyptic number.

It is an amenable number.

117438953477 is a deficient number, since it is larger than the sum of its proper divisors (1).

117438953477 is an equidigital number, since it uses as much as digits as its factorization.

117438953477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17781120, while the sum is 59.

The spelling of 117438953477 in words is "one hundred seventeen billion, four hundred thirty-eight million, nine hundred fifty-three thousand, four hundred seventy-seven".