87268013 has 4 divisors (see below), whose sum is σ = 99734880. Its totient is φ = 74801148.

The previous prime is 87267991. The next prime is 87268033. The reversal of 87268013 is 31086278.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31086278 = 2 ⋅15543139.

It is a cyclic number.

It is not a de Polignac number, because 87268013 - 2⁶ = 87267949 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87268033) 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, 6233423 + ... + 6233436.

It is an arithmetic number, because the mean of its divisors is an integer number (24933720).

Almost surely, 2^87268013 is an apocalyptic number.

It is an amenable number.

87268013 is a deficient number, since it is larger than the sum of its proper divisors (12466867).

87268013 is a wasteful number, since it uses less digits than its factorization.

87268013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12466866.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 87268013 is about 9341.7350101574. The cubic root of 87268013 is about 443.5593065988.

The spelling of 87268013 in words is "eighty-seven million, two hundred sixty-eight thousand, thirteen".