749209 has 2 divisors, whose sum is σ = 749210. Its totient is φ = 749208.

The previous prime is 749197. The next prime is 749219. The reversal of 749209 is 902947.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 697225 + 51984 = 835^2 + 228^2 .

It is a cyclic number.

It is not a de Polignac number, because 749209 - 2⁷ = 749081 is a prime.

It is a super-2 number, since 2×749209² = 1122628251362, which contains 22 as substring.

It is a Chen prime.

749209 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (749219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 374604 + 374605.

It is an arithmetic number, because the mean of its divisors is an integer number (374605).

2⁷⁴⁹²⁰⁹ is an apocalyptic number.

It is an amenable number.

749209 is a deficient number, since it is larger than the sum of its proper divisors (1).

749209 is an equidigital number, since it uses as much as digits as its factorization.

749209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 749209 is about 865.5685992456. The cubic root of 749209 is about 90.8240774640.

The spelling of 749209 in words is "seven hundred forty-nine thousand, two hundred nine".