91134749 has 2 divisors, whose sum is σ = 91134750. Its totient is φ = 91134748.

The previous prime is 91134731. The next prime is 91134781. The reversal of 91134749 is 94743119.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47706649 + 43428100 = 6907^2 + 6590^2 .

It is a cyclic number.

It is not a de Polignac number, because 91134749 - 2²⁰ = 90086173 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 (91134049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45567374 + 45567375.

It is an arithmetic number, because the mean of its divisors is an integer number (45567375).

Almost surely, 2^91134749 is an apocalyptic number.

It is an amenable number.

91134749 is a deficient number, since it is larger than the sum of its proper divisors (1).

91134749 is an equidigital number, since it uses as much as digits as its factorization.

91134749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 38.

The square root of 91134749 is about 9546.4521682141. The cubic root of 91134749 is about 450.0160471644.

The spelling of 91134749 in words is "ninety-one million, one hundred thirty-four thousand, seven hundred forty-nine".