745042447 has 4 divisors (see below), whose sum is σ = 763214256. Its totient is φ = 726870640.

The previous prime is 745042439. The next prime is 745042489. The reversal of 745042447 is 744240547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744240547 = 149 ⋅4994903.

It is a cyclic number.

It is not a de Polignac number, because 745042447 - 2³ = 745042439 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 (745042847) 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, 9085843 + ... + 9085924.

It is an arithmetic number, because the mean of its divisors is an integer number (190803564).

Almost surely, 2^745042447 is an apocalyptic number.

745042447 is a deficient number, since it is larger than the sum of its proper divisors (18171809).

745042447 is a wasteful number, since it uses less digits than its factorization.

745042447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18171808.

The product of its (nonzero) digits is 125440, while the sum is 37.

The square root of 745042447 is about 27295.4656857142. The cubic root of 745042447 is about 906.5539866966.

The spelling of 745042447 in words is "seven hundred forty-five million, forty-two thousand, four hundred forty-seven".