743665145 has 4 divisors (see below), whose sum is σ = 892398180. Its totient is φ = 594932112.

The previous prime is 743665129. The next prime is 743665171. The reversal of 743665145 is 541566347.

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 336795904 + 406869241 = 18352^2 + 20171^2 .

It is a cyclic number.

It is not a de Polignac number, because 743665145 - 2⁴ = 743665129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74366510 + ... + 74366519.

It is an arithmetic number, because the mean of its divisors is an integer number (223099545).

Almost surely, 2^743665145 is an apocalyptic number.

It is an amenable number.

743665145 is a deficient number, since it is larger than the sum of its proper divisors (148733035).

743665145 is a wasteful number, since it uses less digits than its factorization.

743665145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148733034.

The product of its digits is 302400, while the sum is 41.

The square root of 743665145 is about 27270.2245131939. The cubic root of 743665145 is about 905.9950168416.

The spelling of 743665145 in words is "seven hundred forty-three million, six hundred sixty-five thousand, one hundred forty-five".