91841245 has 4 divisors (see below), whose sum is σ = 110209500. Its totient is φ = 73472992.

The previous prime is 91841237. The next prime is 91841257. The reversal of 91841245 is 54214819.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29019769 + 62821476 = 5387^2 + 7926^2 .

It is a cyclic number.

It is not a de Polignac number, because 91841245 - 2³ = 91841237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91841245.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9184120 + ... + 9184129.

It is an arithmetic number, because the mean of its divisors is an integer number (27552375).

Almost surely, 2^91841245 is an apocalyptic number.

It is an amenable number.

91841245 is a deficient number, since it is larger than the sum of its proper divisors (18368255).

91841245 is a wasteful number, since it uses less digits than its factorization.

91841245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18368254.

The product of its digits is 11520, while the sum is 34.

The square root of 91841245 is about 9583.3837969686. The cubic root of 91841245 is about 451.1759285321.

The spelling of 91841245 in words is "ninety-one million, eight hundred forty-one thousand, two hundred forty-five".