63743906 has 4 divisors (see below), whose sum is σ = 95615862. Its totient is φ = 31871952.

The previous prime is 63743873. The next prime is 63743941. The reversal of 63743906 is 60934736.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 54893281 + 8850625 = 7409^2 + 2975^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 63743906.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15935975 + ... + 15935978.

Almost surely, 2^63743906 is an apocalyptic number.

63743906 is a deficient number, since it is larger than the sum of its proper divisors (31871956).

63743906 is a wasteful number, since it uses less digits than its factorization.

63743906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31871955.

The product of its (nonzero) digits is 81648, while the sum is 38.

The square root of 63743906 is about 7983.9780811322. The cubic root of 63743906 is about 399.4657576137.

The spelling of 63743906 in words is "sixty-three million, seven hundred forty-three thousand, nine hundred six".