87816958 has 4 divisors (see below), whose sum is σ = 131725440. Its totient is φ = 43908478.

The previous prime is 87816941. The next prime is 87816973. The reversal of 87816958 is 85961878.

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

It is a super-2 number, since 2×87816958² = 15423636224747528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21954238 + ... + 21954241.

It is an arithmetic number, because the mean of its divisors is an integer number (32931360).

Almost surely, 2^87816958 is an apocalyptic number.

87816958 is a deficient number, since it is larger than the sum of its proper divisors (43908482).

87816958 is a wasteful number, since it uses less digits than its factorization.

87816958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43908481.

The product of its digits is 967680, while the sum is 52.

The square root of 87816958 is about 9371.0702697184. The cubic root of 87816958 is about 444.4874087678.

The spelling of 87816958 in words is "eighty-seven million, eight hundred sixteen thousand, nine hundred fifty-eight".