63840679 has 12 divisors (see below), whose sum is σ = 75103200. Its totient is φ = 54102048.

The previous prime is 63840677. The next prime is 63840683. The reversal of 63840679 is 97604836.

It is a happy number.

It is not a de Polignac number, because 63840679 - 2¹ = 63840677 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 (63840677) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2959 + ... + 11680.

It is an arithmetic number, because the mean of its divisors is an integer number (6258600).

Almost surely, 2^63840679 is an apocalyptic number.

63840679 is a deficient number, since it is larger than the sum of its proper divisors (11262521).

63840679 is a wasteful number, since it uses less digits than its factorization.

63840679 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14742 (or 14735 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 63840679 is about 7990.0362327088. The cubic root of 63840679 is about 399.6678054433.

The spelling of 63840679 in words is "sixty-three million, eight hundred forty thousand, six hundred seventy-nine".