91154243 has 2 divisors, whose sum is σ = 91154244. Its totient is φ = 91154242.

The previous prime is 91154227. The next prime is 91154249. The reversal of 91154243 is 34245119.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91154243 - 2⁴ = 91154227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (91154249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45577121 + 45577122.

It is an arithmetic number, because the mean of its divisors is an integer number (45577122).

Almost surely, 2^91154243 is an apocalyptic number.

91154243 is a deficient number, since it is larger than the sum of its proper divisors (1).

91154243 is an equidigital number, since it uses as much as digits as its factorization.

91154243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4320, while the sum is 29.

The square root of 91154243 is about 9547.4731211981. The cubic root of 91154243 is about 450.0481314772.

The spelling of 91154243 in words is "ninety-one million, one hundred fifty-four thousand, two hundred forty-three".