117651893 has 2 divisors, whose sum is σ = 117651894. Its totient is φ = 117651892.

The previous prime is 117651889. The next prime is 117651907. The reversal of 117651893 is 398156711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64915249 + 52736644 = 8057^2 + 7262^2 .

It is a cyclic number.

It is not a de Polignac number, because 117651893 - 2² = 117651889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117651893.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117651593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58825946 + 58825947.

It is an arithmetic number, because the mean of its divisors is an integer number (58825947).

Almost surely, 2^117651893 is an apocalyptic number.

It is an amenable number.

117651893 is a deficient number, since it is larger than the sum of its proper divisors (1).

117651893 is an equidigital number, since it uses as much as digits as its factorization.

117651893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 41.

The square root of 117651893 is about 10846.7457331681. The cubic root of 117651893 is about 490.0040163491.

The spelling of 117651893 in words is "one hundred seventeen million, six hundred fifty-one thousand, eight hundred ninety-three".