87872393 has 4 divisors (see below), whose sum is σ = 100425600. Its totient is φ = 75319188.

The previous prime is 87872387. The next prime is 87872399. The reversal of 87872393 is 39327878.

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.

It is an interprime number because it is at equal distance from previous prime (87872387) and next prime (87872399).

It is not a de Polignac number, because 87872393 - 2⁶ = 87872329 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87872399) 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, 6276593 + ... + 6276606.

It is an arithmetic number, because the mean of its divisors is an integer number (25106400).

Almost surely, 2^87872393 is an apocalyptic number.

It is an amenable number.

87872393 is a deficient number, since it is larger than the sum of its proper divisors (12553207).

87872393 is a wasteful number, since it uses less digits than its factorization.

87872393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12553206.

The product of its digits is 508032, while the sum is 47.

The square root of 87872393 is about 9374.0275762342. The cubic root of 87872393 is about 444.5809175734.

The spelling of 87872393 in words is "eighty-seven million, eight hundred seventy-two thousand, three hundred ninety-three".