87904563 has 8 divisors (see below), whose sum is σ = 120373968. Its totient is φ = 57019104.

The previous prime is 87904559. The next prime is 87904567. The reversal of 87904563 is 36540978.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (87904559) and next prime (87904567).

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

It is not a de Polignac number, because 87904563 - 2² = 87904559 is a prime.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (87904567) 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, 395856 + ... + 396077.

It is an arithmetic number, because the mean of its divisors is an integer number (15046746).

Almost surely, 2^87904563 is an apocalyptic number.

87904563 is a deficient number, since it is larger than the sum of its proper divisors (32469405).

87904563 is a wasteful number, since it uses less digits than its factorization.

87904563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 791973.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 87904563 is about 9375.7433305312. The cubic root of 87904563 is about 444.6351645053.

The spelling of 87904563 in words is "eighty-seven million, nine hundred four thousand, five hundred sixty-three".