68990773 has 2 divisors, whose sum is σ = 68990774. Its totient is φ = 68990772.

The previous prime is 68990737. The next prime is 68990807. The reversal of 68990773 is 37709986.

Together with previous prime (68990737) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55980324 + 13010449 = 7482^2 + 3607^2 .

It is a cyclic number.

It is not a de Polignac number, because 68990773 - 2⁹ = 68990261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68990723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34495386 + 34495387.

It is an arithmetic number, because the mean of its divisors is an integer number (34495387).

Almost surely, 2^68990773 is an apocalyptic number.

It is an amenable number.

68990773 is a deficient number, since it is larger than the sum of its proper divisors (1).

68990773 is an equidigital number, since it uses as much as digits as its factorization.

68990773 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 68990773 is about 8306.0684442160. The cubic root of 68990773 is about 410.1383094746.

The spelling of 68990773 in words is "sixty-eight million, nine hundred ninety thousand, seven hundred seventy-three".