91250417 has 2 divisors, whose sum is σ = 91250418. Its totient is φ = 91250416.

The previous prime is 91250381. The next prime is 91250503. The reversal of 91250417 is 71405219.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 70829056 + 20421361 = 8416^2 + 4519^2 .

It is a cyclic number.

It is not a de Polignac number, because 91250417 - 2⁸ = 91250161 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91250417.

It is not a weakly prime, because it can be changed into another prime (91250017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45625208 + 45625209.

It is an arithmetic number, because the mean of its divisors is an integer number (45625209).

Almost surely, 2^91250417 is an apocalyptic number.

It is an amenable number.

91250417 is a deficient number, since it is larger than the sum of its proper divisors (1).

91250417 is an equidigital number, since it uses as much as digits as its factorization.

91250417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 91250417 is about 9552.5084140240. The cubic root of 91250417 is about 450.2063530964.

The spelling of 91250417 in words is "ninety-one million, two hundred fifty thousand, four hundred seventeen".