87120958 has 4 divisors (see below), whose sum is σ = 130681440. Its totient is φ = 43560478.

The previous prime is 87120953. The next prime is 87120961. The reversal of 87120958 is 85902178.

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

It is a super-2 number, since 2×87120958² = 15180122645675528, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 87120958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87120953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21780238 + ... + 21780241.

It is an arithmetic number, because the mean of its divisors is an integer number (32670360).

Almost surely, 2^87120958 is an apocalyptic number.

87120958 is a deficient number, since it is larger than the sum of its proper divisors (43560482).

87120958 is a wasteful number, since it uses less digits than its factorization.

87120958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43560481.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 87120958 is about 9333.8608303317. The cubic root of 87120958 is about 443.3100198166.

The spelling of 87120958 in words is "eighty-seven million, one hundred twenty thousand, nine hundred fifty-eight".