87737681 has 2 divisors, whose sum is σ = 87737682. Its totient is φ = 87737680.

The previous prime is 87737653. The next prime is 87737701. The reversal of 87737681 is 18673778.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77440000 + 10297681 = 8800^2 + 3209^2 .

It is a cyclic number.

It is not a de Polignac number, because 87737681 - 2¹⁴ = 87721297 is a prime.

It is a super-2 number, since 2×87737681² = 15395801334515522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87737621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43868840 + 43868841.

It is an arithmetic number, because the mean of its divisors is an integer number (43868841).

Almost surely, 2^87737681 is an apocalyptic number.

It is an amenable number.

87737681 is a deficient number, since it is larger than the sum of its proper divisors (1).

87737681 is an equidigital number, since it uses as much as digits as its factorization.

87737681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 395136, while the sum is 47.

The square root of 87737681 is about 9366.8394349428. The cubic root of 87737681 is about 444.3536144224.

The spelling of 87737681 in words is "eighty-seven million, seven hundred thirty-seven thousand, six hundred eighty-one".