78987337 has 16 divisors (see below), whose sum is σ = 93074688. Its totient is φ = 66084480.

The previous prime is 78987323. The next prime is 78987379. The reversal of 78987337 is 73378987.

It is not a de Polignac number, because 78987337 - 2²³ = 70598729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78987137) 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, 65613 + ... + 66805.

It is an arithmetic number, because the mean of its divisors is an integer number (5817168).

Almost surely, 2^78987337 is an apocalyptic number.

It is an amenable number.

78987337 is a deficient number, since it is larger than the sum of its proper divisors (14087351).

78987337 is a wasteful number, since it uses less digits than its factorization.

78987337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680.

The product of its digits is 1778112, while the sum is 52.

The square root of 78987337 is about 8887.4820393630. The cubic root of 78987337 is about 429.0611153542.

The spelling of 78987337 in words is "seventy-eight million, nine hundred eighty-seven thousand, three hundred thirty-seven".