87331679 has 4 divisors (see below), whose sum is σ = 87408576. Its totient is φ = 87254784.

The previous prime is 87331661. The next prime is 87331723. The reversal of 87331679 is 97613378.

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-87331679 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 (87331649) 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, 36719 + ... + 39024.

It is an arithmetic number, because the mean of its divisors is an integer number (21852144).

Almost surely, 2^87331679 is an apocalyptic number.

87331679 is a deficient number, since it is larger than the sum of its proper divisors (76897).

87331679 is a wasteful number, since it uses less digits than its factorization.

87331679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76896.

The product of its digits is 190512, while the sum is 44.

The square root of 87331679 is about 9345.1419999912. The cubic root of 87331679 is about 443.6671459672.

The spelling of 87331679 in words is "eighty-seven million, three hundred thirty-one thousand, six hundred seventy-nine".