91901357 has 2 divisors, whose sum is σ = 91901358. Its totient is φ = 91901356.

The previous prime is 91901351. The next prime is 91901393. The reversal of 91901357 is 75310919.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75099556 + 16801801 = 8666^2 + 4099^2 .

It is an emirp because it is prime and its reverse (75310919) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91901357 - 2²⁰ = 90852781 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 (91901351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45950678 + 45950679.

It is an arithmetic number, because the mean of its divisors is an integer number (45950679).

Almost surely, 2^91901357 is an apocalyptic number.

It is an amenable number.

91901357 is a deficient number, since it is larger than the sum of its proper divisors (1).

91901357 is an equidigital number, since it uses as much as digits as its factorization.

91901357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 91901357 is about 9586.5195456954. The cubic root of 91901357 is about 451.2743417322.

The spelling of 91901357 in words is "ninety-one million, nine hundred one thousand, three hundred fifty-seven".