63679820 has 12 divisors (see below), whose sum is σ = 133727664. Its totient is φ = 25471920.

The previous prime is 63679817. The next prime is 63679823. The reversal of 63679820 is 2897636.

It is an interprime number because it is at equal distance from previous prime (63679817) and next prime (63679823).

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (63679823) 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, 1591976 + ... + 1592015.

It is an arithmetic number, because the mean of its divisors is an integer number (11143972).

Almost surely, 2^63679820 is an apocalyptic number.

It is an amenable number.

63679820 is an abundant number, since it is smaller than the sum of its proper divisors (70047844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

63679820 is a wasteful number, since it uses less digits than its factorization.

63679820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3184000 (or 3183998 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 63679820 is about 7979.9636590651. The cubic root of 63679820 is about 399.3318428699.

The spelling of 63679820 in words is "sixty-three million, six hundred seventy-nine thousand, eight hundred twenty".