68192009 has 2 divisors, whose sum is σ = 68192010. Its totient is φ = 68192008.

The previous prime is 68191993. The next prime is 68192017. The reversal of 68192009 is 90029186.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47059600 + 21132409 = 6860^2 + 4597^2 .

It is a cyclic number.

It is not a de Polignac number, because 68192009 - 2⁴ = 68191993 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68192009.

It is not a weakly prime, because it can be changed into another prime (68192039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34096004 + 34096005.

It is an arithmetic number, because the mean of its divisors is an integer number (34096005).

Almost surely, 2^68192009 is an apocalyptic number.

It is an amenable number.

68192009 is a deficient number, since it is larger than the sum of its proper divisors (1).

68192009 is an equidigital number, since it uses as much as digits as its factorization.

68192009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 68192009 is about 8257.8453000768. The cubic root of 68192009 is about 408.5493229472.

The spelling of 68192009 in words is "sixty-eight million, one hundred ninety-two thousand, nine".