87003997421 has 64 divisors (see below), whose sum is σ = 103594982400. Its totient is φ = 72832668480.

The previous prime is 87003997387. The next prime is 87003997469. The reversal of 87003997421 is 12479930078.

It is a de Polignac number, because none of the positive numbers 2^k-87003997421 is a prime.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87003997421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87003907421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 186303830 + ... + 186304296.

It is an arithmetic number, because the mean of its divisors is an integer number (1618671600).

Almost surely, 2^87003997421 is an apocalyptic number.

It is an amenable number.

87003997421 is a deficient number, since it is larger than the sum of its proper divisors (16590984979).

87003997421 is a wasteful number, since it uses less digits than its factorization.

87003997421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 762048, while the sum is 50.

The spelling of 87003997421 in words is "eighty-seven billion, three million, nine hundred ninety-seven thousand, four hundred twenty-one".