87921124 has 6 divisors (see below), whose sum is σ = 153861974. Its totient is φ = 43960560.

The previous prime is 87921121. The next prime is 87921131. The reversal of 87921124 is 42112978.

It can be written as a sum of positive squares in only one way, i.e., 62094400 + 25826724 = 7880^2 + 5082^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87921124.

It is not an unprimeable number, because it can be changed into a prime (87921121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10990137 + ... + 10990144.

Almost surely, 2^87921124 is an apocalyptic number.

It is an amenable number.

87921124 is a deficient number, since it is larger than the sum of its proper divisors (65940850).

87921124 is a wasteful number, since it uses less digits than its factorization.

87921124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21980285 (or 21980283 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 87921124 is about 9376.6264722447. The cubic root of 87921124 is about 444.6630854699.

The spelling of 87921124 in words is "eighty-seven million, nine hundred twenty-one thousand, one hundred twenty-four".