87657673 has 4 divisors (see below), whose sum is σ = 87866308. Its totient is φ = 87449040.

The previous prime is 87657667. The next prime is 87657701. The reversal of 87657673 is 37675678.

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

It can be written as a sum of positive squares in 2 ways, for example, as 13749264 + 73908409 = 3708^2 + 8597^2 .

It is a cyclic number.

It is not a de Polignac number, because 87657673 - 2¹⁷ = 87526601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87657173) 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, 103686 + ... + 104527.

It is an arithmetic number, because the mean of its divisors is an integer number (21966577).

Almost surely, 2^87657673 is an apocalyptic number.

It is an amenable number.

87657673 is a deficient number, since it is larger than the sum of its proper divisors (208635).

87657673 is a wasteful number, since it uses less digits than its factorization.

87657673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 208634.

The product of its digits is 1481760, while the sum is 49.

The square root of 87657673 is about 9362.5676499559. The cubic root of 87657673 is about 444.2185046435.

The spelling of 87657673 in words is "eighty-seven million, six hundred fifty-seven thousand, six hundred seventy-three".