91816272139 has 2 divisors, whose sum is σ = 91816272140. Its totient is φ = 91816272138.

The previous prime is 91816272127. The next prime is 91816272151. The reversal of 91816272139 is 93127261819.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (91816272127) and next prime (91816272151).

It is a cyclic number.

It is not a de Polignac number, because 91816272139 - 2⁹ = 91816271627 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91816272092 and 91816272101.

It is not a weakly prime, because it can be changed into another prime (91816272109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45908136069 + 45908136070.

It is an arithmetic number, because the mean of its divisors is an integer number (45908136070).

Almost surely, 2^91816272139 is an apocalyptic number.

91816272139 is a deficient number, since it is larger than the sum of its proper divisors (1).

91816272139 is an equidigital number, since it uses as much as digits as its factorization.

91816272139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 49.

The spelling of 91816272139 in words is "ninety-one billion, eight hundred sixteen million, two hundred seventy-two thousand, one hundred thirty-nine".