91672222 has 4 divisors (see below), whose sum is σ = 137508336. Its totient is φ = 45836110.

The previous prime is 91672213. The next prime is 91672223. The reversal of 91672222 is 22227619.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22227619 = 17 ⋅1307507.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91672223) 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 as a sum of consecutive naturals, namely, 22918054 + ... + 22918057.

It is an arithmetic number, because the mean of its divisors is an integer number (34377084).

Almost surely, 2^91672222 is an apocalyptic number.

91672222 is a deficient number, since it is larger than the sum of its proper divisors (45836114).

91672222 is a wasteful number, since it uses less digits than its factorization.

91672222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45836113.

The product of its digits is 6048, while the sum is 31.

The square root of 91672222 is about 9574.5611909894. The cubic root of 91672222 is about 450.8989798371.

The spelling of 91672222 in words is "ninety-one million, six hundred seventy-two thousand, two hundred twenty-two".