87928310421 has 12 divisors (see below), whose sum is σ = 145151496672. Its totient is φ = 50244748776.

The previous prime is 87928310413. The next prime is 87928310453. The reversal of 87928310421 is 12401382978.

It is a happy number.

It is not a de Polignac number, because 87928310421 - 2³ = 87928310413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87928310411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 697843671 + ... + 697843796.

It is an arithmetic number, because the mean of its divisors is an integer number (12095958056).

Almost surely, 2^87928310421 is an apocalyptic number.

It is an amenable number.

87928310421 is a deficient number, since it is larger than the sum of its proper divisors (57223186251).

87928310421 is a wasteful number, since it uses less digits than its factorization.

87928310421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1395687480 (or 1395687477 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 45.

The spelling of 87928310421 in words is "eighty-seven billion, nine hundred twenty-eight million, three hundred ten thousand, four hundred twenty-one".