87406258621 has 4 divisors (see below), whose sum is σ = 95352282144. Its totient is φ = 79460235100.

The previous prime is 87406258613. The next prime is 87406258637. The reversal of 87406258621 is 12685260478.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87406258621 - 2³ = 87406258613 is a prime.

It is a super-2 number, since 2×87406258621² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87406252621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3973011745 + ... + 3973011766.

It is an arithmetic number, because the mean of its divisors is an integer number (23838070536).

Almost surely, 2^87406258621 is an apocalyptic number.

It is an amenable number.

87406258621 is a deficient number, since it is larger than the sum of its proper divisors (7946023523).

87406258621 is a wasteful number, since it uses less digits than its factorization.

87406258621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7946023522.

The product of its (nonzero) digits is 1290240, while the sum is 49.

The spelling of 87406258621 in words is "eighty-seven billion, four hundred six million, two hundred fifty-eight thousand, six hundred twenty-one".