87424639 has 8 divisors (see below), whose sum is σ = 88704000. Its totient is φ = 86149752.

The previous prime is 87424637. The next prime is 87424657. The reversal of 87424639 is 93642478.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87424639 - 2¹ = 87424637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 87424595 and 87424604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87424637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65622 + ... + 66940.

It is an arithmetic number, because the mean of its divisors is an integer number (11088000).

Almost surely, 2^87424639 is an apocalyptic number.

87424639 is a deficient number, since it is larger than the sum of its proper divisors (1279361).

87424639 is a wasteful number, since it uses less digits than its factorization.

87424639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237.

The product of its digits is 290304, while the sum is 43.

The square root of 87424639 is about 9350.1143843271. The cubic root of 87424639 is about 443.8245102946.

The spelling of 87424639 in words is "eighty-seven million, four hundred twenty-four thousand, six hundred thirty-nine".