87313903 has 4 divisors (see below), whose sum is σ = 87638760. Its totient is φ = 86989048.

The previous prime is 87313859. The next prime is 87313907. The reversal of 87313903 is 30931378.

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

It is a cyclic number.

It is not a de Polignac number, because 87313903 - 2¹³ = 87305711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87313907) 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, 162025 + ... + 162562.

It is an arithmetic number, because the mean of its divisors is an integer number (21909690).

Almost surely, 2^87313903 is an apocalyptic number.

87313903 is a deficient number, since it is larger than the sum of its proper divisors (324857).

87313903 is a wasteful number, since it uses less digits than its factorization.

87313903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324856.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 87313903 is about 9344.1908691978. The cubic root of 87313903 is about 443.6370417239.

The spelling of 87313903 in words is "eighty-seven million, three hundred thirteen thousand, nine hundred three".