91772267 has 2 divisors, whose sum is σ = 91772268. Its totient is φ = 91772266.

The previous prime is 91772237. The next prime is 91772311. The reversal of 91772267 is 76227719.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91772267 - 2¹⁶ = 91706731 is a prime.

It is not a weakly prime, because it can be changed into another prime (91772207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45886133 + 45886134.

It is an arithmetic number, because the mean of its divisors is an integer number (45886134).

Almost surely, 2^91772267 is an apocalyptic number.

91772267 is a deficient number, since it is larger than the sum of its proper divisors (1).

91772267 is an equidigital number, since it uses as much as digits as its factorization.

91772267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 74088, while the sum is 41.

The square root of 91772267 is about 9579.7842877593. The cubic root of 91772267 is about 451.0629473121.

The spelling of 91772267 in words is "ninety-one million, seven hundred seventy-two thousand, two hundred sixty-seven".