87942621 has 16 divisors (see below), whose sum is σ = 132923840. Its totient is φ = 51269760.

The previous prime is 87942607. The next prime is 87942643. The reversal of 87942621 is 12624978.

It is not a de Polignac number, because 87942621 - 2⁶ = 87942557 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 87942621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87942601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58600 + ... + 60081.

It is an arithmetic number, because the mean of its divisors is an integer number (8307740).

Almost surely, 2^87942621 is an apocalyptic number.

It is an amenable number.

87942621 is a deficient number, since it is larger than the sum of its proper divisors (44981219).

87942621 is a wasteful number, since it uses less digits than its factorization.

87942621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118716.

The product of its digits is 48384, while the sum is 39.

The square root of 87942621 is about 9377.7727099776. The cubic root of 87942621 is about 444.6993230389.

The spelling of 87942621 in words is "eighty-seven million, nine hundred forty-two thousand, six hundred twenty-one".