91768426 has 16 divisors (see below), whose sum is σ = 140196960. Its totient is φ = 45041040.

The previous prime is 91768421. The next prime is 91768427. The reversal of 91768426 is 62486719.

It is not an unprimeable number, because it can be changed into a prime (91768421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43320 + ... + 45388.

It is an arithmetic number, because the mean of its divisors is an integer number (8762310).

Almost surely, 2^91768426 is an apocalyptic number.

91768426 is a deficient number, since it is larger than the sum of its proper divisors (48428534).

91768426 is a wasteful number, since it uses less digits than its factorization.

91768426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2469.

The product of its digits is 145152, while the sum is 43.

The square root of 91768426 is about 9579.5838114189. The cubic root of 91768426 is about 451.0566543545.

The spelling of 91768426 in words is "ninety-one million, seven hundred sixty-eight thousand, four hundred twenty-six".