68646463 has 2 divisors, whose sum is σ = 68646464. Its totient is φ = 68646462.

The previous prime is 68646437. The next prime is 68646469. The reversal of 68646463 is 36464686.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68646463 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68646469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34323231 + 34323232.

It is an arithmetic number, because the mean of its divisors is an integer number (34323232).

Almost surely, 2^68646463 is an apocalyptic number.

68646463 is a deficient number, since it is larger than the sum of its proper divisors (1).

68646463 is an equidigital number, since it uses as much as digits as its factorization.

68646463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 497664, while the sum is 43.

The square root of 68646463 is about 8285.3161074276. The cubic root of 68646463 is about 409.4548833329.

The spelling of 68646463 in words is "sixty-eight million, six hundred forty-six thousand, four hundred sixty-three".