743997 has 4 divisors (see below), whose sum is σ = 992000. Its totient is φ = 495996.

The previous prime is 743989. The next prime is 744019. The reversal of 743997 is 799347.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 799347 = 3 ⋅266449.

It is not a de Polignac number, because 743997 - 2³ = 743989 is a prime.

It is a D-number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123997 + ... + 124002.

It is an arithmetic number, because the mean of its divisors is an integer number (248000).

2⁷⁴³⁹⁹⁷ is an apocalyptic number.

It is an amenable number.

743997 is a deficient number, since it is larger than the sum of its proper divisors (248003).

743997 is a wasteful number, since it uses less digits than its factorization.

743997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248002.

The product of its digits is 47628, while the sum is 39.

The square root of 743997 is about 862.5526070913. The cubic root of 743997 is about 90.6129761297.

The spelling of 743997 in words is "seven hundred forty-three thousand, nine hundred ninety-seven".