91794779 has 2 divisors, whose sum is σ = 91794780. Its totient is φ = 91794778.

The previous prime is 91794767. The next prime is 91794797. The reversal of 91794779 is 97749719.

Together with next prime (91794797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91794779 - 2¹² = 91790683 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91794779.

It is not a weakly prime, because it can be changed into another prime (91794709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45897389 + 45897390.

It is an arithmetic number, because the mean of its divisors is an integer number (45897390).

Almost surely, 2^91794779 is an apocalyptic number.

91794779 is a deficient number, since it is larger than the sum of its proper divisors (1).

91794779 is an equidigital number, since it uses as much as digits as its factorization.

91794779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1000188, while the sum is 53.

The square root of 91794779 is about 9580.9591899768. The cubic root of 91794779 is about 451.0998266411.

The spelling of 91794779 in words is "ninety-one million, seven hundred ninety-four thousand, seven hundred seventy-nine".