87893973 has 18 divisors (see below), whose sum is σ = 128305814. Its totient is φ = 57980304.

The previous prime is 87893969. The next prime is 87893977. The reversal of 87893973 is 37939878.

It is an interprime number because it is at equal distance from previous prime (87893969) and next prime (87893977).

It can be written as a sum of positive squares in only one way, i.e., 54508689 + 33385284 = 7383^2 + 5778^2 .

It is not a de Polignac number, because 87893973 - 2² = 87893969 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87893977) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 102615 + ... + 103467.

Almost surely, 2^87893973 is an apocalyptic number.

It is an amenable number.

87893973 is a deficient number, since it is larger than the sum of its proper divisors (40411841).

87893973 is a wasteful number, since it uses less digits than its factorization.

87893973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073 (or 963 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 87893973 is about 9375.1785582996. The cubic root of 87893973 is about 444.6173084906.

The spelling of 87893973 in words is "eighty-seven million, eight hundred ninety-three thousand, nine hundred seventy-three".