91014139 has 2 divisors, whose sum is σ = 91014140. Its totient is φ = 91014138.

The previous prime is 91014127. The next prime is 91014149. The reversal of 91014139 is 93141019.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91014139 - 2²³ = 82625531 is a prime.

It is a super-2 number, since 2×91014139² = 16567146995822642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (91014149) 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, 45507069 + 45507070.

It is an arithmetic number, because the mean of its divisors is an integer number (45507070).

Almost surely, 2^91014139 is an apocalyptic number.

91014139 is a deficient number, since it is larger than the sum of its proper divisors (1).

91014139 is an equidigital number, since it uses as much as digits as its factorization.

91014139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 91014139 is about 9540.1330703507. The cubic root of 91014139 is about 449.8174387036.

The spelling of 91014139 in words is "ninety-one million, fourteen thousand, one hundred thirty-nine".