749500091 has 2 divisors, whose sum is σ = 749500092. Its totient is φ = 749500090.

The previous prime is 749500079. The next prime is 749500109. The reversal of 749500091 is 190005947.

Together with next prime (749500109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 749500091 - 2¹⁸ = 749237947 is a prime.

It is not a weakly prime, because it can be changed into another prime (749500001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374750045 + 374750046.

It is an arithmetic number, because the mean of its divisors is an integer number (374750046).

Almost surely, 2^749500091 is an apocalyptic number.

749500091 is a deficient number, since it is larger than the sum of its proper divisors (1).

749500091 is an equidigital number, since it uses as much as digits as its factorization.

749500091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 749500091 is about 27376.9993059868. Note that the first 3 decimals coincide. The cubic root of 749500091 is about 908.3583860067.

The spelling of 749500091 in words is "seven hundred forty-nine million, five hundred thousand, ninety-one".