87100730 has 16 divisors (see below), whose sum is σ = 159740424. Its totient is φ = 34182720.

The previous prime is 87100723. The next prime is 87100751. The reversal of 87100730 is 3700178.

It can be written as a sum of positive squares in 4 ways, for example, as 77070841 + 10029889 = 8779^2 + 3167^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87100730.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81641 + ... + 82700.

Almost surely, 2^87100730 is an apocalyptic number.

87100730 is a deficient number, since it is larger than the sum of its proper divisors (72639694).

87100730 is a wasteful number, since it uses less digits than its factorization.

87100730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164401.

The product of its (nonzero) digits is 1176, while the sum is 26.

The square root of 87100730 is about 9332.7771858113. Note that the first 3 decimals coincide. The cubic root of 87100730 is about 443.2757074866.

The spelling of 87100730 in words is "eighty-seven million, one hundred thousand, seven hundred thirty".