68545013 has 2 divisors, whose sum is σ = 68545014. Its totient is φ = 68545012.

The previous prime is 68544997. The next prime is 68545019. The reversal of 68545013 is 31054586.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63888049 + 4656964 = 7993^2 + 2158^2 .

It is a cyclic number.

It is not a de Polignac number, because 68545013 - 2⁴ = 68544997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68545019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34272506 + 34272507.

It is an arithmetic number, because the mean of its divisors is an integer number (34272507).

Almost surely, 2^68545013 is an apocalyptic number.

It is an amenable number.

68545013 is a deficient number, since it is larger than the sum of its proper divisors (1).

68545013 is an equidigital number, since it uses as much as digits as its factorization.

68545013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 68545013 is about 8279.1915668138. The cubic root of 68545013 is about 409.2530779474.

Adding to 68545013 its reverse (31054586), we get a palindrome (99599599).

The spelling of 68545013 in words is "sixty-eight million, five hundred forty-five thousand, thirteen".