189379309 has 32 divisors (see below), whose sum is σ = 238878720. Its totient is φ = 146553792.

The previous prime is 189379297. The next prime is 189379313. The reversal of 189379309 is 903973981.

It is not a de Polignac number, because 189379309 - 2⁵ = 189379277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189379339) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219012 + ... + 219874.

It is an arithmetic number, because the mean of its divisors is an integer number (7464960).

Almost surely, 2^189379309 is an apocalyptic number.

It is an amenable number.

189379309 is a deficient number, since it is larger than the sum of its proper divisors (49499411).

189379309 is a wasteful number, since it uses less digits than its factorization.

189379309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 969.

The product of its (nonzero) digits is 367416, while the sum is 49.

The square root of 189379309 is about 13761.5155052051. The cubic root of 189379309 is about 574.2630094091.

The spelling of 189379309 in words is "one hundred eighty-nine million, three hundred seventy-nine thousand, three hundred nine".