447723945 has 12 divisors (see below), whose sum is σ = 776054916. Its totient is φ = 238786080.

The previous prime is 447723943. The next prime is 447723959. The reversal of 447723945 is 549327744.

It can be written as a sum of positive squares in 2 ways, for example, as 320553216 + 127170729 = 17904^2 + 11277^2 .

It is not a de Polignac number, because 447723945 - 2¹ = 447723943 is a prime.

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: 9949421 = 447723945 / (4 + 4 + 7 + 7 + 2 + 3 + 9 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 447723945.

It is not an unprimeable number, because it can be changed into a prime (447723943) 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, 4974666 + ... + 4974755.

It is an arithmetic number, because the mean of its divisors is an integer number (64671243).

Almost surely, 2^447723945 is an apocalyptic number.

447723945 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

447723945 is a deficient number, since it is larger than the sum of its proper divisors (328330971).

447723945 is a wasteful number, since it uses less digits than its factorization.

447723945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9949432 (or 9949429 counting only the distinct ones).

The product of its digits is 846720, while the sum is 45.

The square root of 447723945 is about 21159.4882972155. The cubic root of 447723945 is about 765.0152758708.

The spelling of 447723945 in words is "four hundred forty-seven million, seven hundred twenty-three thousand, nine hundred forty-five".