87210747 has 12 divisors (see below), whose sum is σ = 135661344. Its totient is φ = 53668080.

The previous prime is 87210737. The next prime is 87210749. The reversal of 87210747 is 74701278.

It is not a de Polignac number, because 87210747 - 2⁷ = 87210619 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is an alternating number because its digits alternate between even and odd.

It is not an unprimeable number, because it can be changed into a prime (87210749) 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 in 11 ways as a sum of consecutive naturals, for example, 372579 + ... + 372812.

It is an arithmetic number, because the mean of its divisors is an integer number (11305112).

Almost surely, 2^87210747 is an apocalyptic number.

87210747 is a deficient number, since it is larger than the sum of its proper divisors (48450597).

87210747 is a wasteful number, since it uses less digits than its factorization.

87210747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 745410 (or 745407 counting only the distinct ones).

The product of its (nonzero) digits is 21952, while the sum is 36.

The square root of 87210747 is about 9338.6694448406. The cubic root of 87210747 is about 443.4622629265.

The spelling of 87210747 in words is "eighty-seven million, two hundred ten thousand, seven hundred forty-seven".