189979137 has 6 divisors (see below), whose sum is σ = 274414322. Its totient is φ = 126652752.

The previous prime is 189979109. The next prime is 189979159. The reversal of 189979137 is 731979981.

It can be written as a sum of positive squares in only one way, i.e., 189447696 + 531441 = 13764^2 + 729^2 .

It is not a de Polignac number, because 189979137 - 2⁶ = 189979073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189979177) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10554388 + ... + 10554405.

Almost surely, 2^189979137 is an apocalyptic number.

It is an amenable number.

189979137 is a deficient number, since it is larger than the sum of its proper divisors (84435185).

189979137 is a wasteful number, since it uses less digits than its factorization.

189979137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21108799 (or 21108796 counting only the distinct ones).

The product of its digits is 857304, while the sum is 54.

The square root of 189979137 is about 13783.2919507642. The cubic root of 189979137 is about 574.8686651524.

The spelling of 189979137 in words is "one hundred eighty-nine million, nine hundred seventy-nine thousand, one hundred thirty-seven".