87671559791 has 2 divisors, whose sum is σ = 87671559792. Its totient is φ = 87671559790.

The previous prime is 87671559749. The next prime is 87671559797. The reversal of 87671559791 is 19795517678.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87671559791 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87671559797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43835779895 + 43835779896.

It is an arithmetic number, because the mean of its divisors is an integer number (43835779896).

Almost surely, 2^87671559791 is an apocalyptic number.

87671559791 is a deficient number, since it is larger than the sum of its proper divisors (1).

87671559791 is an equidigital number, since it uses as much as digits as its factorization.

87671559791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33339600, while the sum is 65.

The spelling of 87671559791 in words is "eighty-seven billion, six hundred seventy-one million, five hundred fifty-nine thousand, seven hundred ninety-one".