91279339 has 2 divisors, whose sum is σ = 91279340. Its totient is φ = 91279338.

The previous prime is 91279319. The next prime is 91279343. The reversal of 91279339 is 93397219.

It is a strong prime.

It is an emirp because it is prime and its reverse (93397219) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91279339 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91279295 and 91279304.

It is not a weakly prime, because it can be changed into another prime (91279319) 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, 45639669 + 45639670.

It is an arithmetic number, because the mean of its divisors is an integer number (45639670).

Almost surely, 2^91279339 is an apocalyptic number.

91279339 is a deficient number, since it is larger than the sum of its proper divisors (1).

91279339 is an equidigital number, since it uses as much as digits as its factorization.

91279339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 91854, while the sum is 43.

The square root of 91279339 is about 9554.0221372990. The cubic root of 91279339 is about 450.2539126698.

The spelling of 91279339 in words is "ninety-one million, two hundred seventy-nine thousand, three hundred thirty-nine".