189393915 has 8 divisors (see below), whose sum is σ = 303030288. Its totient is φ = 101010080.

The previous prime is 189393913. The next prime is 189393917. The reversal of 189393915 is 519393981.

It is an interprime number because it is at equal distance from previous prime (189393913) and next prime (189393917).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 189393915 - 2¹ = 189393913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189393913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6313116 + ... + 6313145.

It is an arithmetic number, because the mean of its divisors is an integer number (37878786).

Almost surely, 2^189393915 is an apocalyptic number.

189393915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

189393915 is a deficient number, since it is larger than the sum of its proper divisors (113636373).

189393915 is a wasteful number, since it uses less digits than its factorization.

189393915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12626269.

The product of its digits is 262440, while the sum is 48.

The square root of 189393915 is about 13762.0461778036. The cubic root of 189393915 is about 574.2777724966.

The spelling of 189393915 in words is "one hundred eighty-nine million, three hundred ninety-three thousand, nine hundred fifteen".