189657137 has 4 divisors (see below), whose sum is σ = 189685860. Its totient is φ = 189628416.

The previous prime is 189657121. The next prime is 189657199. The reversal of 189657137 is 731756981.

189657137 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 141229456 + 48427681 = 11884^2 + 6959^2 .

It is a cyclic number.

It is not a de Polignac number, because 189657137 - 2⁴ = 189657121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 189657091 and 189657100.

It is not an unprimeable number, because it can be changed into a prime (189657037) 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, 1073 + ... + 19505.

It is an arithmetic number, because the mean of its divisors is an integer number (47421465).

Almost surely, 2^189657137 is an apocalyptic number.

It is an amenable number.

189657137 is a deficient number, since it is larger than the sum of its proper divisors (28723).

189657137 is a wasteful number, since it uses less digits than its factorization.

189657137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28722.

The product of its digits is 317520, while the sum is 47.

The square root of 189657137 is about 13771.6061880959. The cubic root of 189657137 is about 574.5436954517.

The spelling of 189657137 in words is "one hundred eighty-nine million, six hundred fifty-seven thousand, one hundred thirty-seven".