87667513 has 4 divisors (see below), whose sum is σ = 91479168. Its totient is φ = 83855860.

The previous prime is 87667511. The next prime is 87667519. The reversal of 87667513 is 31576678.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87667513 - 2¹ = 87667511 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87667513.

It is not an unprimeable number, because it can be changed into a prime (87667511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1905793 + ... + 1905838.

It is an arithmetic number, because the mean of its divisors is an integer number (22869792).

Almost surely, 2^87667513 is an apocalyptic number.

It is an amenable number.

87667513 is a deficient number, since it is larger than the sum of its proper divisors (3811655).

87667513 is a wasteful number, since it uses less digits than its factorization.

87667513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3811654.

The product of its digits is 211680, while the sum is 43.

The square root of 87667513 is about 9363.0931320798. The cubic root of 87667513 is about 444.2351259172.

The spelling of 87667513 in words is "eighty-seven million, six hundred sixty-seven thousand, five hundred thirteen".