87671559749 has 2 divisors, whose sum is σ = 87671559750. Its totient is φ = 87671559748.

The previous prime is 87671559739. The next prime is 87671559791. The reversal of 87671559749 is 94795517678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85488988225 + 2182571524 = 292385^2 + 46718^2 .

It is a cyclic number.

It is not a de Polignac number, because 87671559749 - 2⁴ = 87671559733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87671559739) 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 as a sum of consecutive naturals, namely, 43835779874 + 43835779875.

It is an arithmetic number, because the mean of its divisors is an integer number (43835779875).

Almost surely, 2^87671559749 is an apocalyptic number.

It is an amenable number.

87671559749 is a deficient number, since it is larger than the sum of its proper divisors (1).

87671559749 is an equidigital number, since it uses as much as digits as its factorization.

87671559749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 133358400, while the sum is 68.

The spelling of 87671559749 in words is "eighty-seven billion, six hundred seventy-one million, five hundred fifty-nine thousand, seven hundred forty-nine".