87574393 has 4 divisors (see below), whose sum is σ = 87805840. Its totient is φ = 87342948.

The previous prime is 87574387. The next prime is 87574447. The reversal of 87574393 is 39347578.

It is a happy number.

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: 39347578 = 2 ⋅19673789.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87574393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87574343) 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, 115155 + ... + 115912.

It is an arithmetic number, because the mean of its divisors is an integer number (21951460).

Almost surely, 2^87574393 is an apocalyptic number.

It is an amenable number.

87574393 is a deficient number, since it is larger than the sum of its proper divisors (231447).

87574393 is a wasteful number, since it uses less digits than its factorization.

87574393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231446.

The product of its digits is 635040, while the sum is 46.

The square root of 87574393 is about 9358.1190952028. The cubic root of 87574393 is about 444.0777820741.

The spelling of 87574393 in words is "eighty-seven million, five hundred seventy-four thousand, three hundred ninety-three".