91235156879 has 2 divisors, whose sum is σ = 91235156880. Its totient is φ = 91235156878.

The previous prime is 91235156867. The next prime is 91235156891. The reversal of 91235156879 is 97865153219.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (91235156867) and next prime (91235156891).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91235156879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91238156879) 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, 45617578439 + 45617578440.

It is an arithmetic number, because the mean of its divisors is an integer number (45617578440).

Almost surely, 2^91235156879 is an apocalyptic number.

91235156879 is a deficient number, since it is larger than the sum of its proper divisors (1).

91235156879 is an equidigital number, since it uses as much as digits as its factorization.

91235156879 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4082400, while the sum is 56.

The spelling of 91235156879 in words is "ninety-one billion, two hundred thirty-five million, one hundred fifty-six thousand, eight hundred seventy-nine".