91906226 has 8 divisors (see below), whose sum is σ = 138066204. Its totient is φ = 45884160.

The previous prime is 91906223. The next prime is 91906253. The reversal of 91906226 is 62260919.

It can be written as a sum of positive squares in 2 ways, for example, as 85581001 + 6325225 = 9251^2 + 2515^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×91906226³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (91906223) 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 3 ways as a sum of consecutive naturals, for example, 32795 + ... + 35486.

Almost surely, 2^91906226 is an apocalyptic number.

91906226 is a deficient number, since it is larger than the sum of its proper divisors (46159978).

91906226 is a wasteful number, since it uses less digits than its factorization.

91906226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68956.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 91906226 is about 9586.7734926825. The cubic root of 91906226 is about 451.2823112045.

The spelling of 91906226 in words is "ninety-one million, nine hundred six thousand, two hundred twenty-six".