91877742 has 48 divisors (see below), whose sum is σ = 224668080. Its totient is φ = 26880000.

The previous prime is 91877719. The next prime is 91877743. The reversal of 91877742 is 24777819.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91877743) 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, 2259 + ... + 13742.

It is an arithmetic number, because the mean of its divisors is an integer number (4680585).

Almost surely, 2^91877742 is an apocalyptic number.

91877742 is an abundant number, since it is smaller than the sum of its proper divisors (132790338).

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

91877742 is a wasteful number, since it uses less digits than its factorization.

91877742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16049 (or 16046 counting only the distinct ones).

The product of its digits is 197568, while the sum is 45.

The square root of 91877742 is about 9585.2877891068. The cubic root of 91877742 is about 451.2356852246.

It can be divided in two parts, 918777 and 42, that added together give a palindrome (918819).

The spelling of 91877742 in words is "ninety-one million, eight hundred seventy-seven thousand, seven hundred forty-two".