87611879 has 4 divisors (see below), whose sum is σ = 87639384. Its totient is φ = 87584376.

The previous prime is 87611857. The next prime is 87611917. The reversal of 87611879 is 97811678.

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

It is a cyclic number.

It is not a de Polignac number, because 87611879 - 2¹⁶ = 87546343 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 (87611479) 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, 8237 + ... + 15590.

It is an arithmetic number, because the mean of its divisors is an integer number (21909846).

Almost surely, 2^87611879 is an apocalyptic number.

87611879 is a deficient number, since it is larger than the sum of its proper divisors (27505).

87611879 is a wasteful number, since it uses less digits than its factorization.

87611879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27504.

The product of its digits is 169344, while the sum is 47.

The square root of 87611879 is about 9360.1217406613. The cubic root of 87611879 is about 444.1411351637.

The spelling of 87611879 in words is "eighty-seven million, six hundred eleven thousand, eight hundred seventy-nine".