63705967 has 4 divisors (see below), whose sum is σ = 68606440. Its totient is φ = 58805496.

The previous prime is 63705937. The next prime is 63705973. The reversal of 63705967 is 76950736.

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

It is a cyclic number.

It is not a de Polignac number, because 63705967 - 2⁷ = 63705839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63705937) 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, 2450217 + ... + 2450242.

It is an arithmetic number, because the mean of its divisors is an integer number (17151610).

Almost surely, 2^63705967 is an apocalyptic number.

63705967 is a deficient number, since it is larger than the sum of its proper divisors (4900473).

63705967 is a wasteful number, since it uses less digits than its factorization.

63705967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4900472.

The product of its (nonzero) digits is 238140, while the sum is 43.

The square root of 63705967 is about 7981.6017815975. The cubic root of 63705967 is about 399.3864907471.

The spelling of 63705967 in words is "sixty-three million, seven hundred five thousand, nine hundred sixty-seven".