87451573 has 4 divisors (see below), whose sum is σ = 95401728. Its totient is φ = 79501420.

The previous prime is 87451571. The next prime is 87451577. The reversal of 87451573 is 37515478.

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 a cyclic number.

It is not a de Polignac number, because 87451573 - 2¹ = 87451571 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 (87451571) 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, 3975061 + ... + 3975082.

It is an arithmetic number, because the mean of its divisors is an integer number (23850432).

Almost surely, 2^87451573 is an apocalyptic number.

It is an amenable number.

87451573 is a deficient number, since it is larger than the sum of its proper divisors (7950155).

87451573 is a wasteful number, since it uses less digits than its factorization.

87451573 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7950154.

The product of its digits is 117600, while the sum is 40.

The square root of 87451573 is about 9351.5545766466. The cubic root of 87451573 is about 443.8700838007.

The spelling of 87451573 in words is "eighty-seven million, four hundred fifty-one thousand, five hundred seventy-three".