91414247 has 2 divisors, whose sum is σ = 91414248. Its totient is φ = 91414246.

The previous prime is 91414229. The next prime is 91414261. The reversal of 91414247 is 74241419.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91414247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91414447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45707123 + 45707124.

It is an arithmetic number, because the mean of its divisors is an integer number (45707124).

Almost surely, 2^91414247 is an apocalyptic number.

91414247 is a deficient number, since it is larger than the sum of its proper divisors (1).

91414247 is an equidigital number, since it uses as much as digits as its factorization.

91414247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 91414247 is about 9561.0798030348. The cubic root of 91414247 is about 450.4756238651.

The spelling of 91414247 in words is "ninety-one million, four hundred fourteen thousand, two hundred forty-seven".