91339747 has 2 divisors, whose sum is σ = 91339748. Its totient is φ = 91339746.

The previous prime is 91339687. The next prime is 91339751. The reversal of 91339747 is 74793319.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91339747 - 2¹⁵ = 91306979 is a prime.

It is not a weakly prime, because it can be changed into another prime (91339777) 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, 45669873 + 45669874.

It is an arithmetic number, because the mean of its divisors is an integer number (45669874).

Almost surely, 2^91339747 is an apocalyptic number.

91339747 is a deficient number, since it is larger than the sum of its proper divisors (1).

91339747 is an equidigital number, since it uses as much as digits as its factorization.

91339747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 43.

The square root of 91339747 is about 9557.1830054677. The cubic root of 91339747 is about 450.3532156842.

The spelling of 91339747 in words is "ninety-one million, three hundred thirty-nine thousand, seven hundred forty-seven".