87730715 has 4 divisors (see below), whose sum is σ = 105276864. Its totient is φ = 70184568.

The previous prime is 87730703. The next prime is 87730723. The reversal of 87730715 is 51703778.

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

It is a cyclic number.

It is not a de Polignac number, because 87730715 - 2¹⁴ = 87714331 is a prime.

It is a super-2 number, since 2×87730715² = 15393356708822450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8773067 + ... + 8773076.

It is an arithmetic number, because the mean of its divisors is an integer number (26319216).

Almost surely, 2^87730715 is an apocalyptic number.

87730715 is a deficient number, since it is larger than the sum of its proper divisors (17546149).

87730715 is a wasteful number, since it uses less digits than its factorization.

87730715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17546148.

The product of its (nonzero) digits is 41160, while the sum is 38.

The square root of 87730715 is about 9366.4675838867. The cubic root of 87730715 is about 444.3418541799.

The spelling of 87730715 in words is "eighty-seven million, seven hundred thirty thousand, seven hundred fifteen".