68163919 has 2 divisors, whose sum is σ = 68163920. Its totient is φ = 68163918.

The previous prime is 68163877. The next prime is 68163941. The reversal of 68163919 is 91936186.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 68163919 - 2¹⁹ = 67639631 is a prime.

It is a super-2 number, since 2×68163919² = 9292639706877122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68163119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34081959 + 34081960.

It is an arithmetic number, because the mean of its divisors is an integer number (34081960).

Almost surely, 2^68163919 is an apocalyptic number.

68163919 is a deficient number, since it is larger than the sum of its proper divisors (1).

68163919 is an equidigital number, since it uses as much as digits as its factorization.

68163919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69984, while the sum is 43.

The square root of 68163919 is about 8256.1443180216. The cubic root of 68163919 is about 408.4932180029.

The spelling of 68163919 in words is "sixty-eight million, one hundred sixty-three thousand, nine hundred nineteen".