68722013 has 2 divisors, whose sum is σ = 68722014. Its totient is φ = 68722012.

The previous prime is 68721979. The next prime is 68722033. The reversal of 68722013 is 31022786.

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., 66945124 + 1776889 = 8182^2 + 1333^2 .

It is a cyclic number.

It is not a de Polignac number, because 68722013 - 2¹⁶ = 68656477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68722033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34361006 + 34361007.

It is an arithmetic number, because the mean of its divisors is an integer number (34361007).

Almost surely, 2^68722013 is an apocalyptic number.

It is an amenable number.

68722013 is a deficient number, since it is larger than the sum of its proper divisors (1).

68722013 is an equidigital number, since it uses as much as digits as its factorization.

68722013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 68722013 is about 8289.8741244967. The cubic root of 68722013 is about 409.6050390418.

Adding to 68722013 its reverse (31022786), we get a palindrome (99744799).

The spelling of 68722013 in words is "sixty-eight million, seven hundred twenty-two thousand, thirteen".