743998399 has 2 divisors, whose sum is σ = 743998400. Its totient is φ = 743998398.

The previous prime is 743998369. The next prime is 743998417. The reversal of 743998399 is 993899347.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 743998399 - 2⁷ = 743998271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (743998369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 371999199 + 371999200.

It is an arithmetic number, because the mean of its divisors is an integer number (371999200).

Almost surely, 2^743998399 is an apocalyptic number.

743998399 is a deficient number, since it is larger than the sum of its proper divisors (1).

743998399 is an equidigital number, since it uses as much as digits as its factorization.

743998399 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13226976, while the sum is 61.

The square root of 743998399 is about 27276.3340462020. The cubic root of 743998399 is about 906.1303292540.

The spelling of 743998399 in words is "seven hundred forty-three million, nine hundred ninety-eight thousand, three hundred ninety-nine".