63868451 has 2 divisors, whose sum is σ = 63868452. Its totient is φ = 63868450.

The previous prime is 63868429. The next prime is 63868457. The reversal of 63868451 is 15486836.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63868451 is a prime.

It is equal to p_3777728 and since 63868451 and 3777728 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 63868399 and 63868408.

It is not a weakly prime, because it can be changed into another prime (63868457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31934225 + 31934226.

It is an arithmetic number, because the mean of its divisors is an integer number (31934226).

Almost surely, 2^63868451 is an apocalyptic number.

63868451 is a deficient number, since it is larger than the sum of its proper divisors (1).

63868451 is an equidigital number, since it uses as much as digits as its factorization.

63868451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 41.

The square root of 63868451 is about 7991.7739582648. The cubic root of 63868451 is about 399.7257515958.

The spelling of 63868451 in words is "sixty-three million, eight hundred sixty-eight thousand, four hundred fifty-one".