91049747 has 2 divisors, whose sum is σ = 91049748. Its totient is φ = 91049746.

The previous prime is 91049743. The next prime is 91049839. The reversal of 91049747 is 74794019.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91049747 - 2² = 91049743 is a prime.

It is not a weakly prime, because it can be changed into another prime (91049741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45524873 + 45524874.

It is an arithmetic number, because the mean of its divisors is an integer number (45524874).

Almost surely, 2^91049747 is an apocalyptic number.

91049747 is a deficient number, since it is larger than the sum of its proper divisors (1).

91049747 is an equidigital number, since it uses as much as digits as its factorization.

91049747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 91049747 is about 9541.9991092014. Note that the first 3 decimals coincide. The cubic root of 91049747 is about 449.8760926342.

The spelling of 91049747 in words is "ninety-one million, forty-nine thousand, seven hundred forty-seven".