189212915 has 16 divisors (see below), whose sum is σ = 233536608. Its totient is φ = 147104256.

The previous prime is 189212893. The next prime is 189212923. The reversal of 189212915 is 519212981.

It is a happy number.

It is not a de Polignac number, because 189212915 - 2⁶ = 189212851 is a prime.

It is a super-3 number, since 3×189212915³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25019 + ... + 31691.

It is an arithmetic number, because the mean of its divisors is an integer number (14596038).

Almost surely, 2^189212915 is an apocalyptic number.

189212915 is a deficient number, since it is larger than the sum of its proper divisors (44323693).

189212915 is a wasteful number, since it uses less digits than its factorization.

189212915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6838.

The product of its digits is 12960, while the sum is 38.

The square root of 189212915 is about 13755.4685489081. The cubic root of 189212915 is about 574.0947722369.

The spelling of 189212915 in words is "one hundred eighty-nine million, two hundred twelve thousand, nine hundred fifteen".