91113838 has 4 divisors (see below), whose sum is σ = 136670760. Its totient is φ = 45556918.

The previous prime is 91113811. The next prime is 91113859. The reversal of 91113838 is 83831119.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22778458 + ... + 22778461.

It is an arithmetic number, because the mean of its divisors is an integer number (34167690).

Almost surely, 2^91113838 is an apocalyptic number.

91113838 is a deficient number, since it is larger than the sum of its proper divisors (45556922).

91113838 is a wasteful number, since it uses less digits than its factorization.

91113838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45556921.

The product of its digits is 5184, while the sum is 34.

The square root of 91113838 is about 9545.3568817515. The cubic root of 91113838 is about 449.9816255872.

The spelling of 91113838 in words is "ninety-one million, one hundred thirteen thousand, eight hundred thirty-eight".