91153243 has 2 divisors, whose sum is σ = 91153244. Its totient is φ = 91153242.

The previous prime is 91153211. The next prime is 91153253. The reversal of 91153243 is 34235119.

It is a strong prime.

It is an emirp because it is prime and its reverse (34235119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91153243 - 2⁵ = 91153211 is a prime.

It is not a weakly prime, because it can be changed into another prime (91153253) 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, 45576621 + 45576622.

It is an arithmetic number, because the mean of its divisors is an integer number (45576622).

Almost surely, 2^91153243 is an apocalyptic number.

91153243 is a deficient number, since it is larger than the sum of its proper divisors (1).

91153243 is an equidigital number, since it uses as much as digits as its factorization.

91153243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 91153243 is about 9547.4207511767. The cubic root of 91153243 is about 450.0464857328.

The spelling of 91153243 in words is "ninety-one million, one hundred fifty-three thousand, two hundred forty-three".