91194643 has 2 divisors, whose sum is σ = 91194644. Its totient is φ = 91194642.

The previous prime is 91194611. The next prime is 91194659. The reversal of 91194643 is 34649119.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91194643 - 2⁵ = 91194611 is a prime.

It is not a weakly prime, because it can be changed into another prime (91194683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45597321 + 45597322.

It is an arithmetic number, because the mean of its divisors is an integer number (45597322).

Almost surely, 2^91194643 is an apocalyptic number.

91194643 is a deficient number, since it is larger than the sum of its proper divisors (1).

91194643 is an equidigital number, since it uses as much as digits as its factorization.

91194643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 37.

The square root of 91194643 is about 9549.5886298835. The cubic root of 91194643 is about 450.1146094910.

The spelling of 91194643 in words is "ninety-one million, one hundred ninety-four thousand, six hundred forty-three".