87464131 has 4 divisors (see below), whose sum is σ = 87610264. Its totient is φ = 87318000.

The previous prime is 87464093. The next prime is 87464141. The reversal of 87464131 is 13146478.

It is a happy number.

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 87464131 - 2¹¹ = 87462083 is a prime.

It is a super-2 number, since 2×87464131² = 15299948423170322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87464141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72165 + ... + 73366.

It is an arithmetic number, because the mean of its divisors is an integer number (21902566).

Almost surely, 2^87464131 is an apocalyptic number.

87464131 is a deficient number, since it is larger than the sum of its proper divisors (146133).

87464131 is a wasteful number, since it uses less digits than its factorization.

87464131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146132.

The product of its digits is 16128, while the sum is 34.

The square root of 87464131 is about 9352.2259917091. The cubic root of 87464131 is about 443.8913292875.

The spelling of 87464131 in words is "eighty-seven million, four hundred sixty-four thousand, one hundred thirty-one".