68244989 has 2 divisors, whose sum is σ = 68244990. Its totient is φ = 68244988.

The previous prime is 68244949. The next prime is 68244991. The reversal of 68244989 is 98944286.

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., 67404100 + 840889 = 8210^2 + 917^2 .

It is a cyclic number.

It is not a de Polignac number, because 68244989 - 2¹⁶ = 68179453 is a prime.

It is a super-2 number, since 2×68244989² = 9314757047220242, which contains 22 as substring.

Together with 68244991, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68244929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34122494 + 34122495.

It is an arithmetic number, because the mean of its divisors is an integer number (34122495).

Almost surely, 2^68244989 is an apocalyptic number.

It is an amenable number.

68244989 is a deficient number, since it is larger than the sum of its proper divisors (1).

68244989 is an equidigital number, since it uses as much as digits as its factorization.

68244989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 995328, while the sum is 50.

The square root of 68244989 is about 8261.0525358455. The cubic root of 68244989 is about 408.6550994665.

The spelling of 68244989 in words is "sixty-eight million, two hundred forty-four thousand, nine hundred eighty-nine".