87401621 has 8 divisors (see below), whose sum is σ = 90961920. Its totient is φ = 83877808.

The previous prime is 87401609. The next prime is 87401651. The reversal of 87401621 is 12610478.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87401621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87401651) 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 7 ways as a sum of consecutive naturals, for example, 4181 + ... + 13866.

It is an arithmetic number, because the mean of its divisors is an integer number (11370240).

Almost surely, 2^87401621 is an apocalyptic number.

It is an amenable number.

87401621 is a deficient number, since it is larger than the sum of its proper divisors (3560299).

87401621 is a wasteful number, since it uses less digits than its factorization.

87401621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18243.

The product of its (nonzero) digits is 2688, while the sum is 29.

The square root of 87401621 is about 9348.8834092634. The cubic root of 87401621 is about 443.7855554133.

The spelling of 87401621 in words is "eighty-seven million, four hundred one thousand, six hundred twenty-one".