87239793 has 4 divisors (see below), whose sum is σ = 116319728. Its totient is φ = 58159860.

The previous prime is 87239783. The next prime is 87239813. The reversal of 87239793 is 39793278.

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.

It is not a de Polignac number, because 87239793 - 2¹⁰ = 87238769 is a prime.

It is a super-2 number, since 2×87239793² = 15221562965365698, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87239753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14539963 + ... + 14539968.

It is an arithmetic number, because the mean of its divisors is an integer number (29079932).

Almost surely, 2^87239793 is an apocalyptic number.

It is an amenable number.

87239793 is a deficient number, since it is larger than the sum of its proper divisors (29079935).

87239793 is a wasteful number, since it uses less digits than its factorization.

87239793 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29079934.

The product of its digits is 571536, while the sum is 48.

The square root of 87239793 is about 9340.2244619709. The cubic root of 87239793 is about 443.5114899449.

The spelling of 87239793 in words is "eighty-seven million, two hundred thirty-nine thousand, seven hundred ninety-three".