117621877 has 2 divisors, whose sum is σ = 117621878. Its totient is φ = 117621876.

The previous prime is 117621821. The next prime is 117621919. The reversal of 117621877 is 778126711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63584676 + 54037201 = 7974^2 + 7351^2 .

It is an emirp because it is prime and its reverse (778126711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117621877 - 2²³ = 109233269 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117621817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58810938 + 58810939.

It is an arithmetic number, because the mean of its divisors is an integer number (58810939).

Almost surely, 2^117621877 is an apocalyptic number.

It is an amenable number.

117621877 is a deficient number, since it is larger than the sum of its proper divisors (1).

117621877 is an equidigital number, since it uses as much as digits as its factorization.

117621877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32928, while the sum is 40.

The square root of 117621877 is about 10845.3620041011. The cubic root of 117621877 is about 489.9623419622.

The spelling of 117621877 in words is "one hundred seventeen million, six hundred twenty-one thousand, eight hundred seventy-seven".