91238245 has 12 divisors (see below), whose sum is σ = 127361484. Its totient is φ = 62563200.

The previous prime is 91238237. The next prime is 91238291. The reversal of 91238245 is 54283219.

It can be written as a sum of positive squares in 2 ways, for example, as 13198689 + 78039556 = 3633^2 + 8834^2 .

It is not a de Polignac number, because 91238245 - 2³ = 91238237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91238245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 185956 + ... + 186445.

It is an arithmetic number, because the mean of its divisors is an integer number (10613457).

Almost surely, 2^91238245 is an apocalyptic number.

It is an amenable number.

91238245 is a deficient number, since it is larger than the sum of its proper divisors (36123239).

91238245 is a wasteful number, since it uses less digits than its factorization.

91238245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372420 (or 372413 counting only the distinct ones).

The product of its digits is 17280, while the sum is 34.

The square root of 91238245 is about 9551.8712826336. The cubic root of 91238245 is about 450.1863343553.

The spelling of 91238245 in words is "ninety-one million, two hundred thirty-eight thousand, two hundred forty-five".