743323409 has 2 divisors, whose sum is σ = 743323410. Its totient is φ = 743323408.

The previous prime is 743323387. The next prime is 743323417. The reversal of 743323409 is 904323347.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 582160384 + 161163025 = 24128^2 + 12695^2 .

It is a cyclic number.

It is not a de Polignac number, because 743323409 - 2²⁰ = 742274833 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (743323109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371661704 + 371661705.

It is an arithmetic number, because the mean of its divisors is an integer number (371661705).

Almost surely, 2^743323409 is an apocalyptic number.

It is an amenable number.

743323409 is a deficient number, since it is larger than the sum of its proper divisors (1).

743323409 is an equidigital number, since it uses as much as digits as its factorization.

743323409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 35.

The square root of 743323409 is about 27263.9580582130. The cubic root of 743323409 is about 905.8562184624.

The spelling of 743323409 in words is "seven hundred forty-three million, three hundred twenty-three thousand, four hundred nine".