91461239 has 2 divisors, whose sum is σ = 91461240. Its totient is φ = 91461238.

The previous prime is 91461197. The next prime is 91461247. The reversal of 91461239 is 93216419.

It is a strong prime.

It is an emirp because it is prime and its reverse (93216419) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91461239 - 2²⁴ = 74684023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91461199 and 91461208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91461289) 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, 45730619 + 45730620.

It is an arithmetic number, because the mean of its divisors is an integer number (45730620).

Almost surely, 2^91461239 is an apocalyptic number.

91461239 is a deficient number, since it is larger than the sum of its proper divisors (1).

91461239 is an equidigital number, since it uses as much as digits as its factorization.

91461239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 35.

The square root of 91461239 is about 9563.5369503129. The cubic root of 91461239 is about 450.5528004721.

The spelling of 91461239 in words is "ninety-one million, four hundred sixty-one thousand, two hundred thirty-nine".