68049389 has 2 divisors, whose sum is σ = 68049390. Its totient is φ = 68049388.

The previous prime is 68049367. The next prime is 68049413. The reversal of 68049389 is 98394086.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43626025 + 24423364 = 6605^2 + 4942^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68049389 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68040389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34024694 + 34024695.

It is an arithmetic number, because the mean of its divisors is an integer number (34024695).

Almost surely, 2^68049389 is an apocalyptic number.

It is an amenable number.

68049389 is a deficient number, since it is larger than the sum of its proper divisors (1).

68049389 is an equidigital number, since it uses as much as digits as its factorization.

68049389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248, while the sum is 47.

The square root of 68049389 is about 8249.2053556691. The cubic root of 68049389 is about 408.2643043477.

The spelling of 68049389 in words is "sixty-eight million, forty-nine thousand, three hundred eighty-nine".