68738491 has 2 divisors, whose sum is σ = 68738492. Its totient is φ = 68738490.

The previous prime is 68738477. The next prime is 68738519. The reversal of 68738491 is 19483786.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68738491 - 2⁵ = 68738459 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (68738441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34369245 + 34369246.

It is an arithmetic number, because the mean of its divisors is an integer number (34369246).

Almost surely, 2^68738491 is an apocalyptic number.

68738491 is a deficient number, since it is larger than the sum of its proper divisors (1).

68738491 is an equidigital number, since it uses as much as digits as its factorization.

68738491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 290304, while the sum is 46.

The square root of 68738491 is about 8290.8679280278. The cubic root of 68738491 is about 409.6377744646.

The spelling of 68738491 in words is "sixty-eight million, seven hundred thirty-eight thousand, four hundred ninety-one".