91425243 has 16 divisors (see below), whose sum is σ = 150031616. Its totient is φ = 48224160.

The previous prime is 91425241. The next prime is 91425251. The reversal of 91425243 is 34252419.

It is not a de Polignac number, because 91425243 - 2¹ = 91425241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91425243.

It is not an unprimeable number, because it can be changed into a prime (91425241) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167173 + ... + 167718.

It is an arithmetic number, because the mean of its divisors is an integer number (9376976).

Almost surely, 2^91425243 is an apocalyptic number.

91425243 is a deficient number, since it is larger than the sum of its proper divisors (58606373).

91425243 is a wasteful number, since it uses less digits than its factorization.

91425243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334914.

The product of its digits is 8640, while the sum is 30.

The square root of 91425243 is about 9561.6548253950. The cubic root of 91425243 is about 450.4936853508.

The spelling of 91425243 in words is "ninety-one million, four hundred twenty-five thousand, two hundred forty-three".