87133939591 has 2 divisors, whose sum is σ = 87133939592. Its totient is φ = 87133939590.

The previous prime is 87133939559. The next prime is 87133939649. The reversal of 87133939591 is 19593933178.

It is an a-pointer prime, because the next prime (87133939649) can be obtained adding 87133939591 to its sum of digits (58).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87133939591 - 2⁵ = 87133939559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87133939391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43566969795 + 43566969796.

It is an arithmetic number, because the mean of its divisors is an integer number (43566969796).

Almost surely, 2^87133939591 is an apocalyptic number.

87133939591 is a deficient number, since it is larger than the sum of its proper divisors (1).

87133939591 is an equidigital number, since it uses as much as digits as its factorization.

87133939591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5511240, while the sum is 58.

The spelling of 87133939591 in words is "eighty-seven billion, one hundred thirty-three million, nine hundred thirty-nine thousand, five hundred ninety-one".