87679231 has 2 divisors, whose sum is σ = 87679232. Its totient is φ = 87679230.

The previous prime is 87679223. The next prime is 87679247. The reversal of 87679231 is 13297678.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87679231 - 2³ = 87679223 is a prime.

It is a super-2 number, since 2×87679231² = 15375295097502722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87679271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43839615 + 43839616.

It is an arithmetic number, because the mean of its divisors is an integer number (43839616).

Almost surely, 2^87679231 is an apocalyptic number.

87679231 is a deficient number, since it is larger than the sum of its proper divisors (1).

87679231 is an equidigital number, since it uses as much as digits as its factorization.

87679231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 127008, while the sum is 43.

The square root of 87679231 is about 9363.7188659207. The cubic root of 87679231 is about 444.2549177995.

The spelling of 87679231 in words is "eighty-seven million, six hundred seventy-nine thousand, two hundred thirty-one".