187979493 has 8 divisors (see below), whose sum is σ = 269919328. Its totient is φ = 115679664.

The previous prime is 187979423. The next prime is 187979503. The reversal of 187979493 is 394979781.

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

It is not a de Polignac number, because 187979493 - 2²⁰ = 186930917 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 (187979413) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2409955 + ... + 2410032.

It is an arithmetic number, because the mean of its divisors is an integer number (33739916).

Almost surely, 2^187979493 is an apocalyptic number.

187979493 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

187979493 is a deficient number, since it is larger than the sum of its proper divisors (81939835).

187979493 is a wasteful number, since it uses less digits than its factorization.

187979493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4820003.

The product of its digits is 3429216, while the sum is 57.

The square root of 187979493 is about 13710.5613670630. The cubic root of 187979493 is about 572.8446014944.

The spelling of 187979493 in words is "one hundred eighty-seven million, nine hundred seventy-nine thousand, four hundred ninety-three".