87905393 has 4 divisors (see below), whose sum is σ = 88021668. Its totient is φ = 87789120.

The previous prime is 87905387. The next prime is 87905401. The reversal of 87905393 is 39350978.

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 28815424 + 59089969 = 5368^2 + 7687^2 .

It is a cyclic number.

It is not a de Polignac number, because 87905393 - 2⁶ = 87905329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87905093) 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, 56996 + ... + 58517.

It is an arithmetic number, because the mean of its divisors is an integer number (22005417).

Almost surely, 2^87905393 is an apocalyptic number.

It is an amenable number.

87905393 is a deficient number, since it is larger than the sum of its proper divisors (116275).

87905393 is a wasteful number, since it uses less digits than its factorization.

87905393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116274.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 87905393 is about 9375.7875935838. The cubic root of 87905393 is about 444.6365639246.

The spelling of 87905393 in words is "eighty-seven million, nine hundred five thousand, three hundred ninety-three".