117263921 has 2 divisors, whose sum is σ = 117263922. Its totient is φ = 117263920.

The previous prime is 117263903. The next prime is 117263933. The reversal of 117263921 is 129362711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 115261696 + 2002225 = 10736^2 + 1415^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-117263921 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (117263521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58631960 + 58631961.

It is an arithmetic number, because the mean of its divisors is an integer number (58631961).

Almost surely, 2^117263921 is an apocalyptic number.

It is an amenable number.

117263921 is a deficient number, since it is larger than the sum of its proper divisors (1).

117263921 is an equidigital number, since it uses as much as digits as its factorization.

117263921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 32.

The square root of 117263921 is about 10828.8467068289. The cubic root of 117263921 is about 489.4648064669.

The spelling of 117263921 in words is "one hundred seventeen million, two hundred sixty-three thousand, nine hundred twenty-one".