91516339 has 2 divisors, whose sum is σ = 91516340. Its totient is φ = 91516338.

The previous prime is 91516289. The next prime is 91516343. The reversal of 91516339 is 93361519.

It is a strong prime.

It is an emirp because it is prime and its reverse (93361519) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91516339 - 2²³ = 83127731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91516298 and 91516307.

It is not a weakly prime, because it can be changed into another prime (91516039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45758169 + 45758170.

It is an arithmetic number, because the mean of its divisors is an integer number (45758170).

Almost surely, 2^91516339 is an apocalyptic number.

91516339 is a deficient number, since it is larger than the sum of its proper divisors (1).

91516339 is an equidigital number, since it uses as much as digits as its factorization.

91516339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21870, while the sum is 37.

The square root of 91516339 is about 9566.4172499426. The cubic root of 91516339 is about 450.6432594685.

The spelling of 91516339 in words is "ninety-one million, five hundred sixteen thousand, three hundred thirty-nine".