91416139 has 2 divisors, whose sum is σ = 91416140. Its totient is φ = 91416138.

The previous prime is 91416133. The next prime is 91416161. The reversal of 91416139 is 93161419.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91416139 - 2¹¹ = 91414091 is a prime.

It is not a weakly prime, because it can be changed into another prime (91416133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45708069 + 45708070.

It is an arithmetic number, because the mean of its divisors is an integer number (45708070).

Almost surely, 2^91416139 is an apocalyptic number.

91416139 is a deficient number, since it is larger than the sum of its proper divisors (1).

91416139 is an equidigital number, since it uses as much as digits as its factorization.

91416139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5832, while the sum is 34.

The square root of 91416139 is about 9561.1787453221. The cubic root of 91416139 is about 450.4787316738.

The spelling of 91416139 in words is "ninety-one million, four hundred sixteen thousand, one hundred thirty-nine".