87425439 has 4 divisors (see below), whose sum is σ = 116567256. Its totient is φ = 58283624.

The previous prime is 87425431. The next prime is 87425453. The reversal of 87425439 is 93452478.

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

It is a cyclic number.

It is not a de Polignac number, because 87425439 - 2³ = 87425431 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87425439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87425431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14570904 + ... + 14570909.

It is an arithmetic number, because the mean of its divisors is an integer number (29141814).

Almost surely, 2^87425439 is an apocalyptic number.

87425439 is a deficient number, since it is larger than the sum of its proper divisors (29141817).

87425439 is a wasteful number, since it uses less digits than its factorization.

87425439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29141816.

The product of its digits is 241920, while the sum is 42.

The square root of 87425439 is about 9350.1571644545. The cubic root of 87425439 is about 443.8258640644.

The spelling of 87425439 in words is "eighty-seven million, four hundred twenty-five thousand, four hundred thirty-nine".