745005013 has 4 divisors (see below), whose sum is σ = 748258540. Its totient is φ = 741751488.

The previous prime is 745005011. The next prime is 745005031. The reversal of 745005013 is 310500547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 310500547 = 7 ⋅44357221.

It can be written as a sum of positive squares in 2 ways, for example, as 351300049 + 393704964 = 18743^2 + 19842^2 .

It is a cyclic number.

It is not a de Polignac number, because 745005013 - 2¹ = 745005011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745005011) 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, 1626420 + ... + 1626877.

It is an arithmetic number, because the mean of its divisors is an integer number (187064635).

Almost surely, 2^745005013 is an apocalyptic number.

It is an amenable number.

745005013 is a deficient number, since it is larger than the sum of its proper divisors (3253527).

745005013 is a wasteful number, since it uses less digits than its factorization.

745005013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3253526.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 745005013 is about 27294.7799588126. The cubic root of 745005013 is about 906.5388034408.

The spelling of 745005013 in words is "seven hundred forty-five million, five thousand, thirteen".