997743 has 8 divisors (see below), whose sum is σ = 1346688. Its totient is φ = 656984.

The previous prime is 997741. The next prime is 997751. The reversal of 997743 is 347799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 997743 - 2¹ = 997741 is a prime.

It is a nialpdrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1755 + ... + 2252.

It is an arithmetic number, because the mean of its divisors is an integer number (168336).

2⁹⁹⁷⁷⁴³ is an apocalyptic number.

997743 is a deficient number, since it is larger than the sum of its proper divisors (348945).

997743 is a wasteful number, since it uses less digits than its factorization.

997743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4093.

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

The square root of 997743 is about 998.8708625243. The cubic root of 997743 is about 99.9247099950.

The spelling of 997743 in words is "nine hundred ninety-seven thousand, seven hundred forty-three".