87564377 has 8 divisors (see below), whose sum is σ = 89206752. Its totient is φ = 85932000.

The previous prime is 87564329. The next prime is 87564391. The reversal of 87564377 is 77346578.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87564377 - 2⁶ = 87564313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87564277) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16502 + ... + 21152.

It is an arithmetic number, because the mean of its divisors is an integer number (11150844).

Almost surely, 2^87564377 is an apocalyptic number.

It is an amenable number.

87564377 is a deficient number, since it is larger than the sum of its proper divisors (1642375).

87564377 is a wasteful number, since it uses less digits than its factorization.

87564377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4999.

The product of its digits is 987840, while the sum is 47.

The square root of 87564377 is about 9357.5839296263. The cubic root of 87564377 is about 444.0608515061.

The spelling of 87564377 in words is "eighty-seven million, five hundred sixty-four thousand, three hundred seventy-seven".