63970643 has 24 divisors (see below), whose sum is σ = 75324816. Its totient is φ = 54095360.

The previous prime is 63970637. The next prime is 63970651. The reversal of 63970643 is 34607936.

It is a happy number.

63970643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 63970643 - 2²⁴ = 47193427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63970597 and 63970606.

It is not an unprimeable number, because it can be changed into a prime (63970603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 281696 + ... + 281922.

It is an arithmetic number, because the mean of its divisors is an integer number (3138534).

Almost surely, 2^63970643 is an apocalyptic number.

63970643 is a deficient number, since it is larger than the sum of its proper divisors (11354173).

63970643 is a wasteful number, since it uses less digits than its factorization.

63970643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 38.

The square root of 63970643 is about 7998.1649770432. The cubic root of 63970643 is about 399.9388302295.

The spelling of 63970643 in words is "sixty-three million, nine hundred seventy thousand, six hundred forty-three".