117821672 has 8 divisors (see below), whose sum is σ = 220915650. Its totient is φ = 58910832.

The previous prime is 117821657. The next prime is 117821681. The reversal of 117821672 is 276128711.

It can be written as a sum of positive squares in only one way, i.e., 77193796 + 40627876 = 8786^2 + 6374^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7363847 + ... + 7363862.

Almost surely, 2^117821672 is an apocalyptic number.

It is an amenable number.

117821672 is a deficient number, since it is larger than the sum of its proper divisors (103093978).

117821672 is a wasteful number, since it uses less digits than its factorization.

117821672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14727715 (or 14727711 counting only the distinct ones).

The product of its digits is 9408, while the sum is 35.

The square root of 117821672 is about 10854.5691761580. The cubic root of 117821672 is about 490.2396051543.

The spelling of 117821672 in words is "one hundred seventeen million, eight hundred twenty-one thousand, six hundred seventy-two".