117771953 has 4 divisors (see below), whose sum is σ = 126831348. Its totient is φ = 108712560.

The previous prime is 117771923. The next prime is 117771977. The reversal of 117771953 is 359177711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 48832144 + 68939809 = 6988^2 + 8303^2 .

It is a cyclic number.

It is not a de Polignac number, because 117771953 - 2²⁴ = 100994737 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 117771953.

It is not an unprimeable number, because it can be changed into a prime (117771923) 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, 4529678 + ... + 4529703.

It is an arithmetic number, because the mean of its divisors is an integer number (31707837).

Almost surely, 2^117771953 is an apocalyptic number.

117771953 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

117771953 is a deficient number, since it is larger than the sum of its proper divisors (9059395).

117771953 is an equidigital number, since it uses as much as digits as its factorization.

117771953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9059394.

The product of its digits is 46305, while the sum is 41.

The square root of 117771953 is about 10852.2787008075. The cubic root of 117771953 is about 490.1706375022.

The spelling of 117771953 in words is "one hundred seventeen million, seven hundred seventy-one thousand, nine hundred fifty-three".