117949157 has 4 divisors (see below), whose sum is σ = 118212300. Its totient is φ = 117686016.

The previous prime is 117949127. The next prime is 117949163. The reversal of 117949157 is 751949711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 751949711 = 71 ⋅10590841.

It can be written as a sum of positive squares in 2 ways, for example, as 39112516 + 78836641 = 6254^2 + 8879^2 .

It is a cyclic number.

It is not a de Polignac number, because 117949157 - 2²² = 113754853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117949127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130898 + ... + 131795.

It is an arithmetic number, because the mean of its divisors is an integer number (29553075).

Almost surely, 2^117949157 is an apocalyptic number.

It is an amenable number.

117949157 is a deficient number, since it is larger than the sum of its proper divisors (263143).

117949157 is an equidigital number, since it uses as much as digits as its factorization.

117949157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263142.

The product of its digits is 79380, while the sum is 44.

The square root of 117949157 is about 10860.4400002946. The cubic root of 117949157 is about 490.4163572101.

The spelling of 117949157 in words is "one hundred seventeen million, nine hundred forty-nine thousand, one hundred fifty-seven".