743373721 has 2 divisors, whose sum is σ = 743373722. Its totient is φ = 743373720.

The previous prime is 743373713. The next prime is 743373737. The reversal of 743373721 is 127373347.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 743162121 + 211600 = 27261^2 + 460^2 .

It is a cyclic number.

It is not a de Polignac number, because 743373721 - 2³ = 743373713 is a prime.

It is not a weakly prime, because it can be changed into another prime (743373751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371686860 + 371686861.

It is an arithmetic number, because the mean of its divisors is an integer number (371686861).

Almost surely, 2^743373721 is an apocalyptic number.

It is an amenable number.

743373721 is a deficient number, since it is larger than the sum of its proper divisors (1).

743373721 is an equidigital number, since it uses as much as digits as its factorization.

743373721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 74088, while the sum is 37.

The square root of 743373721 is about 27264.8807259449. The cubic root of 743373721 is about 905.8766556903.

The spelling of 743373721 in words is "seven hundred forty-three million, three hundred seventy-three thousand, seven hundred twenty-one".