63423505 has 4 divisors (see below), whose sum is σ = 76108212. Its totient is φ = 50738800.

The previous prime is 63423497. The next prime is 63423509. The reversal of 63423505 is 50532436.

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

It can be written as a sum of positive squares in 2 ways, for example, as 41679936 + 21743569 = 6456^2 + 4663^2 .

It is not a de Polignac number, because 63423505 - 2³ = 63423497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63423509) 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, 6342346 + ... + 6342355.

It is an arithmetic number, because the mean of its divisors is an integer number (19027053).

Almost surely, 2^63423505 is an apocalyptic number.

It is an amenable number.

63423505 is a deficient number, since it is larger than the sum of its proper divisors (12684707).

63423505 is a wasteful number, since it uses less digits than its factorization.

63423505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12684706.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 63423505 is about 7963.8875557105. The cubic root of 63423505 is about 398.7953444043.

The spelling of 63423505 in words is "sixty-three million, four hundred twenty-three thousand, five hundred five".