91755149 has 2 divisors, whose sum is σ = 91755150. Its totient is φ = 91755148.

The previous prime is 91755143. The next prime is 91755187. The reversal of 91755149 is 94155719.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83814025 + 7941124 = 9155^2 + 2818^2 .

It is a cyclic number.

It is not a de Polignac number, because 91755149 - 2⁸ = 91754893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91755143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45877574 + 45877575.

It is an arithmetic number, because the mean of its divisors is an integer number (45877575).

Almost surely, 2^91755149 is an apocalyptic number.

It is an amenable number.

91755149 is a deficient number, since it is larger than the sum of its proper divisors (1).

91755149 is an equidigital number, since it uses as much as digits as its factorization.

91755149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 41.

The square root of 91755149 is about 9578.8908021754. The cubic root of 91755149 is about 451.0349004380.

The spelling of 91755149 in words is "ninety-one million, seven hundred fifty-five thousand, one hundred forty-nine".