87404879 has 4 divisors (see below), whose sum is σ = 87443376. Its totient is φ = 87366384.

The previous prime is 87404861. The next prime is 87404881. The reversal of 87404879 is 97840478.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87404879 is a prime.

It is a super-2 number, since 2×87404879² = 15279225746009282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87404809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15614 + ... + 20459.

It is an arithmetic number, because the mean of its divisors is an integer number (21860844).

Almost surely, 2^87404879 is an apocalyptic number.

87404879 is a deficient number, since it is larger than the sum of its proper divisors (38497).

87404879 is a wasteful number, since it uses less digits than its factorization.

87404879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38496.

The product of its (nonzero) digits is 451584, while the sum is 47.

The square root of 87404879 is about 9349.0576530472. The cubic root of 87404879 is about 443.7910695573.

The spelling of 87404879 in words is "eighty-seven million, four hundred four thousand, eight hundred seventy-nine".