63473945 has 8 divisors (see below), whose sum is σ = 78026760. Its totient is φ = 49540480.

The previous prime is 63473939. The next prime is 63473947. The reversal of 63473945 is 54937436.

It can be written as a sum of positive squares in 4 ways, for example, as 446224 + 63027721 = 668^2 + 7939^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 63473945 - 2⁸ = 63473689 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is not an unprimeable number, because it can be changed into a prime (63473947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154610 + ... + 155019.

It is an arithmetic number, because the mean of its divisors is an integer number (9753345).

Almost surely, 2^63473945 is an apocalyptic number.

It is an amenable number.

63473945 is a deficient number, since it is larger than the sum of its proper divisors (14552815).

63473945 is a wasteful number, since it uses less digits than its factorization.

63473945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309675.

The product of its digits is 272160, while the sum is 41.

The square root of 63473945 is about 7967.0537214205. The cubic root of 63473945 is about 398.9010355412.

The spelling of 63473945 in words is "sixty-three million, four hundred seventy-three thousand, nine hundred forty-five".