743605138 has 4 divisors (see below), whose sum is σ = 1115407710. Its totient is φ = 371802568.

The previous prime is 743605133. The next prime is 743605141. The reversal of 743605138 is 831506347.

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

It can be written as a sum of positive squares in only one way, i.e., 619661449 + 123943689 = 24893^2 + 11133^2 .

It is a junction number, because it is equal to n+sod(n) for n = 743605097 and 743605106.

It is not an unprimeable number, because it can be changed into a prime (743605133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 185901283 + ... + 185901286.

Almost surely, 2^743605138 is an apocalyptic number.

743605138 is a deficient number, since it is larger than the sum of its proper divisors (371802572).

743605138 is a wasteful number, since it uses less digits than its factorization.

743605138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371802571.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 743605138 is about 27269.1242616993. The cubic root of 743605138 is about 905.9706476723.

The spelling of 743605138 in words is "seven hundred forty-three million, six hundred five thousand, one hundred thirty-eight".