87790879 has 8 divisors (see below), whose sum is σ = 97395840. Its totient is φ = 78456600.

The previous prime is 87790867. The next prime is 87790891. The reversal of 87790879 is 97809778.

It is an interprime number because it is at equal distance from previous prime (87790867) and next prime (87790891).

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

It is a cyclic number.

It is not a de Polignac number, because 87790879 - 2⁵ = 87790847 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 (87790979) 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, 66987 + ... + 68284.

It is an arithmetic number, because the mean of its divisors is an integer number (12174480).

Almost surely, 2^87790879 is an apocalyptic number.

87790879 is a deficient number, since it is larger than the sum of its proper divisors (9604961).

87790879 is a wasteful number, since it uses less digits than its factorization.

87790879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135341.

The product of its (nonzero) digits is 1778112, while the sum is 55.

The square root of 87790879 is about 9369.6787031360. The cubic root of 87790879 is about 444.4434046064.

The spelling of 87790879 in words is "eighty-seven million, seven hundred ninety thousand, eight hundred seventy-nine".