87375681 has 12 divisors (see below), whose sum is σ = 127015252. Its totient is φ = 57878496.

The previous prime is 87375667. The next prime is 87375703. The reversal of 87375681 is 18657378.

87375681 is a `hidden beast` number, since 87 + 3 + 7 + 568 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27468081 + 59907600 = 5241^2 + 7740^2 .

It is not a de Polignac number, because 87375681 - 2⁵ = 87375649 is a prime.

It is a super-2 number, since 2×87375681² = 15269019260427522, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (87375481) 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, 29506 + ... + 32331.

Almost surely, 2^87375681 is an apocalyptic number.

It is an amenable number.

87375681 is a deficient number, since it is larger than the sum of its proper divisors (39639571).

87375681 is a wasteful number, since it uses less digits than its factorization.

87375681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62000 (or 61997 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 87375681 is about 9347.4959748587. The cubic root of 87375681 is about 443.7416472408.

The spelling of 87375681 in words is "eighty-seven million, three hundred seventy-five thousand, six hundred eighty-one".