87373421992 has 8 divisors (see below), whose sum is σ = 163825166250. Its totient is φ = 43686710992.

The previous prime is 87373421987. The next prime is 87373422001. The reversal of 87373421992 is 29912437378.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 57162115396 + 30211306596 = 239086^2 + 173814^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×87373421992² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (55) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5460838867 + ... + 5460838882.

Almost surely, 2^87373421992 is an apocalyptic number.

It is an amenable number.

87373421992 is a deficient number, since it is larger than the sum of its proper divisors (76451744258).

87373421992 is a wasteful number, since it uses less digits than its factorization.

87373421992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10921677755 (or 10921677751 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 55.

The spelling of 87373421992 in words is "eighty-seven billion, three hundred seventy-three million, four hundred twenty-one thousand, nine hundred ninety-two".