189137895 has 16 divisors (see below), whose sum is σ = 310800480. Its totient is φ = 98146944.

The previous prime is 189137891. The next prime is 189137899. The reversal of 189137895 is 598731981.

189137895 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (189137891) and next prime (189137899).

It is not a de Polignac number, because 189137895 - 2² = 189137891 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189137891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169840 + ... + 170949.

It is an arithmetic number, because the mean of its divisors is an integer number (19425030).

Almost surely, 2^189137895 is an apocalyptic number.

189137895 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

189137895 is a deficient number, since it is larger than the sum of its proper divisors (121662585).

189137895 is a wasteful number, since it uses less digits than its factorization.

189137895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340834.

The product of its digits is 544320, while the sum is 51.

The square root of 189137895 is about 13752.7413630883. The cubic root of 189137895 is about 574.0188889687.

The spelling of 189137895 in words is "one hundred eighty-nine million, one hundred thirty-seven thousand, eight hundred ninety-five".