189191937 has 16 divisors (see below), whose sum is σ = 279855360. Its totient is φ = 112717200.

The previous prime is 189191921. The next prime is 189191939. The reversal of 189191937 is 739191981.

It is a happy number.

It is not a de Polignac number, because 189191937 - 2⁴ = 189191921 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189191939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46639 + ... + 50532.

It is an arithmetic number, because the mean of its divisors is an integer number (17490960).

Almost surely, 2^189191937 is an apocalyptic number.

It is an amenable number.

189191937 is a deficient number, since it is larger than the sum of its proper divisors (90663423).

189191937 is a wasteful number, since it uses less digits than its factorization.

189191937 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97244.

The product of its digits is 122472, while the sum is 48.

The square root of 189191937 is about 13754.7059946769. The cubic root of 189191937 is about 574.0735548599.

The spelling of 189191937 in words is "one hundred eighty-nine million, one hundred ninety-one thousand, nine hundred thirty-seven".