87012947 has 16 divisors (see below), whose sum is σ = 102658752. Its totient is φ = 72199680.

The previous prime is 87012941. The next prime is 87012971. The reversal of 87012947 is 74921078.

It is not a de Polignac number, because 87012947 - 2¹⁰ = 87011923 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 87012947.

It is not an unprimeable number, because it can be changed into a prime (87012941) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38213 + ... + 40425.

It is an arithmetic number, because the mean of its divisors is an integer number (6416172).

Almost surely, 2^87012947 is an apocalyptic number.

87012947 is a deficient number, since it is larger than the sum of its proper divisors (15645805).

87012947 is a wasteful number, since it uses less digits than its factorization.

87012947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 87012947 is about 9328.0730593194. The cubic root of 87012947 is about 443.1267414521.

The spelling of 87012947 in words is "eighty-seven million, twelve thousand, nine hundred forty-seven".