745447905 has 12 divisors (see below), whose sum is σ = 1292109780. Its totient is φ = 397572192.

The previous prime is 745447873. The next prime is 745447907. The reversal of 745447905 is 509744547.

745447905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 446434641 + 299013264 = 21129^2 + 17292^2 .

It is not a de Polignac number, because 745447905 - 2⁵ = 745447873 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 16565509 = 745447905 / (7 + 4 + 5 + 4 + 4 + 7 + 9 + 0 + 5).

It is not an unprimeable number, because it can be changed into a prime (745447907) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8282710 + ... + 8282799.

It is an arithmetic number, because the mean of its divisors is an integer number (107675815).

Almost surely, 2^745447905 is an apocalyptic number.

It is an amenable number.

745447905 is a deficient number, since it is larger than the sum of its proper divisors (546661875).

745447905 is a wasteful number, since it uses less digits than its factorization.

745447905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16565520 (or 16565517 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The square root of 745447905 is about 27302.8918797991. The cubic root of 745447905 is about 906.7184081601.

The spelling of 745447905 in words is "seven hundred forty-five million, four hundred forty-seven thousand, nine hundred five".