91995442 has 48 divisors (see below), whose sum is σ = 178113600. Its totient is φ = 35229600.

The previous prime is 91995437. The next prime is 91995443. The reversal of 91995442 is 24459919.

It is a super-2 number, since 2×91995442² = 16926322697550728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91995443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 65059 + ... + 66457.

It is an arithmetic number, because the mean of its divisors is an integer number (3710700).

Almost surely, 2^91995442 is an apocalyptic number.

91995442 is a deficient number, since it is larger than the sum of its proper divisors (86118158).

91995442 is a wasteful number, since it uses less digits than its factorization.

91995442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1487 (or 1480 counting only the distinct ones).

The product of its digits is 116640, while the sum is 43.

The square root of 91995442 is about 9591.4254415076. The cubic root of 91995442 is about 451.4282881920.

It can be divided in two parts, 9199 and 5442, that added together give a palindrome (14641).

The spelling of 91995442 in words is "ninety-one million, nine hundred ninety-five thousand, four hundred forty-two".