91421834 has 16 divisors (see below), whose sum is σ = 157105536. Its totient is φ = 39085200.

The previous prime is 91421831. The next prime is 91421851. The reversal of 91421834 is 43812419.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 91421834.

It is not an unprimeable number, because it can be changed into a prime (91421831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1862 + ... + 13649.

It is an arithmetic number, because the mean of its divisors is an integer number (9819096).

Almost surely, 2^91421834 is an apocalyptic number.

91421834 is a deficient number, since it is larger than the sum of its proper divisors (65683702).

91421834 is a wasteful number, since it uses less digits than its factorization.

91421834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15941.

The product of its digits is 6912, while the sum is 32.

The square root of 91421834 is about 9561.4765596115. The cubic root of 91421834 is about 450.4880860509.

The spelling of 91421834 in words is "ninety-one million, four hundred twenty-one thousand, eight hundred thirty-four".