63699673 has 4 divisors (see below), whose sum is σ = 66469248. Its totient is φ = 60930100.

The previous prime is 63699661. The next prime is 63699679. The reversal of 63699673 is 37699636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63699673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63699679) 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, 1384753 + ... + 1384798.

It is an arithmetic number, because the mean of its divisors is an integer number (16617312).

Almost surely, 2^63699673 is an apocalyptic number.

It is an amenable number.

63699673 is a deficient number, since it is larger than the sum of its proper divisors (2769575).

63699673 is a wasteful number, since it uses less digits than its factorization.

63699673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2769574.

The product of its digits is 1102248, while the sum is 49.

The square root of 63699673 is about 7981.2074900982. The cubic root of 63699673 is about 399.3733374980.

The spelling of 63699673 in words is "sixty-three million, six hundred ninety-nine thousand, six hundred seventy-three".