743716321 has 2 divisors, whose sum is σ = 743716322. Its totient is φ = 743716320.

The previous prime is 743716313. The next prime is 743716361. The reversal of 743716321 is 123617347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 743325696 + 390625 = 27264^2 + 625^2 .

It is a cyclic number.

It is not a de Polignac number, because 743716321 - 2³ = 743716313 is a prime.

It is a super-2 number, since 2×743716321² = 1106227932243550082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (743716361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371858160 + 371858161.

It is an arithmetic number, because the mean of its divisors is an integer number (371858161).

Almost surely, 2^743716321 is an apocalyptic number.

It is an amenable number.

743716321 is a deficient number, since it is larger than the sum of its proper divisors (1).

743716321 is an equidigital number, since it uses as much as digits as its factorization.

743716321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 34.

The square root of 743716321 is about 27271.1628098253. The cubic root of 743716321 is about 906.0157986579.

The spelling of 743716321 in words is "seven hundred forty-three million, seven hundred sixteen thousand, three hundred twenty-one".