68322391 has 2 divisors, whose sum is σ = 68322392. Its totient is φ = 68322390.

The previous prime is 68322383. The next prime is 68322407. The reversal of 68322391 is 19322386.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 68322391 - 2³ = 68322383 is a prime.

It is a super-3 number, since 3×68322391³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68322301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34161195 + 34161196.

It is an arithmetic number, because the mean of its divisors is an integer number (34161196).

Almost surely, 2^68322391 is an apocalyptic number.

68322391 is a deficient number, since it is larger than the sum of its proper divisors (1).

68322391 is an equidigital number, since it uses as much as digits as its factorization.

68322391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 34.

The square root of 68322391 is about 8265.7359623932. The cubic root of 68322391 is about 408.8095370386.

The spelling of 68322391 in words is "sixty-eight million, three hundred twenty-two thousand, three hundred ninety-one".