63977972 has 6 divisors (see below), whose sum is σ = 111961458. Its totient is φ = 31988984.

The previous prime is 63977941. The next prime is 63977981. The reversal of 63977972 is 27977936.

It can be written as a sum of positive squares in only one way, i.e., 63138916 + 839056 = 7946^2 + 916^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 63977972.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7997243 + ... + 7997250.

It is an arithmetic number, because the mean of its divisors is an integer number (18660243).

Almost surely, 2^63977972 is an apocalyptic number.

It is an amenable number.

63977972 is a deficient number, since it is larger than the sum of its proper divisors (47983486).

63977972 is a wasteful number, since it uses less digits than its factorization.

63977972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15994497 (or 15994495 counting only the distinct ones).

The product of its digits is 1000188, while the sum is 50.

The square root of 63977972 is about 7998.6231315146. The cubic root of 63977972 is about 399.9541030672.

The spelling of 63977972 in words is "sixty-three million, nine hundred seventy-seven thousand, nine hundred seventy-two".