749279849 has 2 divisors, whose sum is σ = 749279850. Its totient is φ = 749279848.

The previous prime is 749279819. The next prime is 749279887. The reversal of 749279849 is 948972947.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 743543824 + 5736025 = 27268^2 + 2395^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-749279849 is a prime.

It is a super-2 number, since 2×749279849² = 1122840584234925602, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (749279819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374639924 + 374639925.

It is an arithmetic number, because the mean of its divisors is an integer number (374639925).

Almost surely, 2^749279849 is an apocalyptic number.

It is an amenable number.

749279849 is a deficient number, since it is larger than the sum of its proper divisors (1).

749279849 is an equidigital number, since it uses as much as digits as its factorization.

749279849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 59.

The square root of 749279849 is about 27372.9766192864. The cubic root of 749279849 is about 908.2694030214.

The spelling of 749279849 in words is "seven hundred forty-nine million, two hundred seventy-nine thousand, eight hundred forty-nine".