743406997 has 4 divisors (see below), whose sum is σ = 763499116. Its totient is φ = 723314880.

The previous prime is 743406973. The next prime is 743407019. The reversal of 743406997 is 799604347.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 525372241 + 218034756 = 22921^2 + 14766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-743406997 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 743406997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (743400997) 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, 10046004 + ... + 10046077.

It is an arithmetic number, because the mean of its divisors is an integer number (190874779).

Almost surely, 2^743406997 is an apocalyptic number.

It is an amenable number.

743406997 is a deficient number, since it is larger than the sum of its proper divisors (20092119).

743406997 is a wasteful number, since it uses less digits than its factorization.

743406997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20092118.

The product of its (nonzero) digits is 1143072, while the sum is 49.

The square root of 743406997 is about 27265.4909546848. The cubic root of 743406997 is about 905.8901722213.

The spelling of 743406997 in words is "seven hundred forty-three million, four hundred six thousand, nine hundred ninety-seven".