749447291 has 2 divisors, whose sum is σ = 749447292. Its totient is φ = 749447290.

The previous prime is 749447287. The next prime is 749447299. The reversal of 749447291 is 192744947.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (192744947) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 749447291 - 2² = 749447287 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (749447299) 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, 374723645 + 374723646.

It is an arithmetic number, because the mean of its divisors is an integer number (374723646).

Almost surely, 2^749447291 is an apocalyptic number.

749447291 is a deficient number, since it is larger than the sum of its proper divisors (1).

749447291 is an equidigital number, since it uses as much as digits as its factorization.

749447291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 47.

The square root of 749447291 is about 27376.0349758689. The cubic root of 749447291 is about 908.3370551447.

The spelling of 749447291 in words is "seven hundred forty-nine million, four hundred forty-seven thousand, two hundred ninety-one".