63783861 has 4 divisors (see below), whose sum is σ = 85045152. Its totient is φ = 42522572.

The previous prime is 63783827. The next prime is 63783901. The reversal of 63783861 is 16838736.

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 not a de Polignac number, because 63783861 - 2²² = 59589557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63783961) 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, 10630641 + ... + 10630646.

It is an arithmetic number, because the mean of its divisors is an integer number (21261288).

Almost surely, 2^63783861 is an apocalyptic number.

It is an amenable number.

63783861 is a deficient number, since it is larger than the sum of its proper divisors (21261291).

63783861 is a wasteful number, since it uses less digits than its factorization.

63783861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21261290.

The product of its digits is 145152, while the sum is 42.

The square root of 63783861 is about 7986.4798879106. The cubic root of 63783861 is about 399.5492025617.

The spelling of 63783861 in words is "sixty-three million, seven hundred eighty-three thousand, eight hundred sixty-one".