91227942 has 48 divisors (see below), whose sum is σ = 214053840. Its totient is φ = 27913536.

The previous prime is 91227931. The next prime is 91227943. The reversal of 91227942 is 24972219.

It is a junction number, because it is equal to n+sod(n) for n = 91227897 and 91227906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91227943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45109 + ... + 47087.

It is an arithmetic number, because the mean of its divisors is an integer number (4459455).

Almost surely, 2^91227942 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91227942, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107026920).

91227942 is an abundant number, since it is smaller than the sum of its proper divisors (122825898).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91227942 is a wasteful number, since it uses less digits than its factorization.

91227942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197 (or 2194 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 91227942 is about 9551.3319490006. The cubic root of 91227942 is about 450.1693880831.

The spelling of 91227942 in words is "ninety-one million, two hundred twenty-seven thousand, nine hundred forty-two".