91005942 has 16 divisors (see below), whose sum is σ = 182776320. Its totient is φ = 30207912.

The previous prime is 91005919. The next prime is 91006001. The reversal of 91005942 is 24950019.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30298 + ... + 33165.

It is an arithmetic number, because the mean of its divisors is an integer number (11423520).

Almost surely, 2^91005942 is an apocalyptic number.

91005942 is an abundant number, since it is smaller than the sum of its proper divisors (91770378).

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

91005942 is a wasteful number, since it uses less digits than its factorization.

91005942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63707.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 91005942 is about 9539.7034545105. The cubic root of 91005942 is about 449.8039343394.

The spelling of 91005942 in words is "ninety-one million, five thousand, nine hundred forty-two".