63974651 has 4 divisors (see below), whose sum is σ = 68895792. Its totient is φ = 59053512.

The previous prime is 63974627. The next prime is 63974663. The reversal of 63974651 is 15647936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63974651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63974599 and 63974608.

It is not an unprimeable number, because it can be changed into a prime (63974671) 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, 2460551 + ... + 2460576.

It is an arithmetic number, because the mean of its divisors is an integer number (17223948).

Almost surely, 2^63974651 is an apocalyptic number.

63974651 is a deficient number, since it is larger than the sum of its proper divisors (4921141).

63974651 is a wasteful number, since it uses less digits than its factorization.

63974651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4921140.

The product of its digits is 136080, while the sum is 41.

The square root of 63974651 is about 7998.4155305910. The cubic root of 63974651 is about 399.9471826094.

The spelling of 63974651 in words is "sixty-three million, nine hundred seventy-four thousand, six hundred fifty-one".