749279819 has 2 divisors, whose sum is σ = 749279820. Its totient is φ = 749279818.

The previous prime is 749279767. The next prime is 749279849. The reversal of 749279819 is 918972947.

It is a strong prime.

It is an emirp because it is prime and its reverse (918972947) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-749279819 is a prime.

It is a super-2 number, since 2×749279819² = 1122840494321345522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (749279849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374639909 + 374639910.

It is an arithmetic number, because the mean of its divisors is an integer number (374639910).

Almost surely, 2^749279819 is an apocalyptic number.

749279819 is a deficient number, since it is larger than the sum of its proper divisors (1).

749279819 is an equidigital number, since it uses as much as digits as its factorization.

749279819 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 56.

The square root of 749279819 is about 27372.9760713007. The cubic root of 749279819 is about 908.2693908995.

The spelling of 749279819 in words is "seven hundred forty-nine million, two hundred seventy-nine thousand, eight hundred nineteen".