91426690 has 16 divisors (see below), whose sum is σ = 165198528. Its totient is φ = 36430576.

The previous prime is 91426681. The next prime is 91426691. The reversal of 91426690 is 9662419.

It is a super-2 number, since 2×91426690² = 16717679288712200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91426691) 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, 14752 + ... + 20011.

It is an arithmetic number, because the mean of its divisors is an integer number (10324908).

Almost surely, 2^91426690 is an apocalyptic number.

91426690 is a deficient number, since it is larger than the sum of its proper divisors (73771838).

91426690 is a wasteful number, since it uses less digits than its factorization.

91426690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35033.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 91426690 is about 9561.7304919141. The cubic root of 91426690 is about 450.4960620136.

The spelling of 91426690 in words is "ninety-one million, four hundred twenty-six thousand, six hundred ninety".