68071399 has 16 divisors (see below), whose sum is σ = 75753216. Its totient is φ = 60652800.

The previous prime is 68071351. The next prime is 68071447. The reversal of 68071399 is 99317086.

It is an interprime number because it is at equal distance from previous prime (68071351) and next prime (68071447).

It is a cyclic number.

It is not a de Polignac number, because 68071399 - 2⁷ = 68071271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68071999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139534 + ... + 140020.

It is an arithmetic number, because the mean of its divisors is an integer number (4734576).

Almost surely, 2^68071399 is an apocalyptic number.

68071399 is a deficient number, since it is larger than the sum of its proper divisors (7681817).

68071399 is a wasteful number, since it uses less digits than its factorization.

68071399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 68071399 is about 8250.5393157054. The cubic root of 68071399 is about 408.3083161498.

The spelling of 68071399 in words is "sixty-eight million, seventy-one thousand, three hundred ninety-nine".