87697149777 has 6 divisors (see below), whose sum is σ = 126673660802. Its totient is φ = 58464766512.

The previous prime is 87697149713. The next prime is 87697149829. The reversal of 87697149777 is 77794179678.

87697149777 is a `hidden beast` number, since 8 + 7 + 69 + 7 + 1 + 497 + 77 = 666.

It can be written as a sum of positive squares in only one way, i.e., 44863052481 + 42834097296 = 211809^2 + 206964^2 .

It is not a de Polignac number, because 87697149777 - 2⁶ = 87697149713 is a prime.

It is a super-2 number, since 2×87697149777² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87697149707) 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 5 ways as a sum of consecutive naturals, for example, 4872063868 + ... + 4872063885.

Almost surely, 2^87697149777 is an apocalyptic number.

It is an amenable number.

87697149777 is a deficient number, since it is larger than the sum of its proper divisors (38976511025).

87697149777 is a wasteful number, since it uses less digits than its factorization.

87697149777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9744127759 (or 9744127756 counting only the distinct ones).

The product of its digits is 261382464, while the sum is 72.

The spelling of 87697149777 in words is "eighty-seven billion, six hundred ninety-seven million, one hundred forty-nine thousand, seven hundred seventy-seven".