745388447 has 4 divisors (see below), whose sum is σ = 746629296. Its totient is φ = 744147600.

The previous prime is 745388431. The next prime is 745388453. The reversal of 745388447 is 744883547.

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

It is a cyclic number.

It is not a de Polignac number, because 745388447 - 2⁴ = 745388431 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 745388395 and 745388404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745388047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 619523 + ... + 620724.

It is an arithmetic number, because the mean of its divisors is an integer number (186657324).

Almost surely, 2^745388447 is an apocalyptic number.

745388447 is a deficient number, since it is larger than the sum of its proper divisors (1240849).

745388447 is a wasteful number, since it uses less digits than its factorization.

745388447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1240848.

The product of its digits is 3010560, while the sum is 50.

The square root of 745388447 is about 27301.8029990695. The cubic root of 745388447 is about 906.6943004631.

The spelling of 745388447 in words is "seven hundred forty-five million, three hundred eighty-eight thousand, four hundred forty-seven".