87515013423 has 4 divisors (see below), whose sum is σ = 116686684568. Its totient is φ = 58343342280.

The previous prime is 87515013389. The next prime is 87515013571. The reversal of 87515013423 is 32431051578.

It is a happy number.

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

It is not a de Polignac number, because 87515013423 - 2²⁵ = 87481458991 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 (87515012423) 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, 14585835568 + ... + 14585835573.

It is an arithmetic number, because the mean of its divisors is an integer number (29171671142).

Almost surely, 2^87515013423 is an apocalyptic number.

87515013423 is a deficient number, since it is larger than the sum of its proper divisors (29171671145).

87515013423 is a wasteful number, since it uses less digits than its factorization.

87515013423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29171671144.

The product of its (nonzero) digits is 100800, while the sum is 39.

The spelling of 87515013423 in words is "eighty-seven billion, five hundred fifteen million, thirteen thousand, four hundred twenty-three".