87425381 has 4 divisors (see below), whose sum is σ = 87524832. Its totient is φ = 87325932.

The previous prime is 87425347. The next prime is 87425399. The reversal of 87425381 is 18352478.

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 a de Polignac number, because none of the positive numbers 2^k-87425381 is a prime.

It is a super-2 number, since 2×87425381² = 15286394485990322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87425341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48395 + ... + 50168.

It is an arithmetic number, because the mean of its divisors is an integer number (21881208).

Almost surely, 2^87425381 is an apocalyptic number.

It is an amenable number.

87425381 is a deficient number, since it is larger than the sum of its proper divisors (99451).

87425381 is an equidigital number, since it uses as much as digits as its factorization.

87425381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99450.

The product of its digits is 53760, while the sum is 38.

The square root of 87425381 is about 9350.1540629019. The cubic root of 87425381 is about 443.8257659164.

The spelling of 87425381 in words is "eighty-seven million, four hundred twenty-five thousand, three hundred eighty-one".