91144442 has 8 divisors (see below), whose sum is σ = 138589716. Its totient is φ = 44947872.

The previous prime is 91144441. The next prime is 91144447. The reversal of 91144442 is 24444119.

It can be written as a sum of positive squares in 2 ways, for example, as 83521321 + 7623121 = 9139^2 + 2761^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (91144441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 311993 + ... + 312284.

Almost surely, 2^91144442 is an apocalyptic number.

91144442 is a deficient number, since it is larger than the sum of its proper divisors (47445274).

91144442 is a wasteful number, since it uses less digits than its factorization.

91144442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624352.

The product of its digits is 4608, while the sum is 29.

The square root of 91144442 is about 9546.9598302287. The cubic root of 91144442 is about 450.0320010164.

The spelling of 91144442 in words is "ninety-one million, one hundred forty-four thousand, four hundred forty-two".