87240087297 has 72 divisors (see below), whose sum is σ = 148669669512. Its totient is φ = 49080176640.

The previous prime is 87240087281. The next prime is 87240087301. The reversal of 87240087297 is 79278004278.

87240087297 is a `hidden beast` number, since 8 + 72 + 400 + 87 + 2 + 97 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 4282262721 + 82957824576 = 65439^2 + 288024^2 .

It is not a de Polignac number, because 87240087297 - 2⁴ = 87240087281 is a prime.

It is a super-2 number, since 2×87240087297² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87240087227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1319173 + ... + 1383725.

It is an arithmetic number, because the mean of its divisors is an integer number (2064856521).

Almost surely, 2^87240087297 is an apocalyptic number.

It is an amenable number.

87240087297 is a deficient number, since it is larger than the sum of its proper divisors (61429582215).

87240087297 is a wasteful number, since it uses less digits than its factorization.

87240087297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64671 (or 64657 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 54.

The spelling of 87240087297 in words is "eighty-seven billion, two hundred forty million, eighty-seven thousand, two hundred ninety-seven".