68409351 has 6 divisors (see below), whose sum is σ = 98813520. Its totient is φ = 45606228.

The previous prime is 68409349. The next prime is 68409353. The reversal of 68409351 is 15390486.

It is an interprime number because it is at equal distance from previous prime (68409349) and next prime (68409353).

It is not a de Polignac number, because 68409351 - 2¹ = 68409349 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68409353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3800511 + ... + 3800528.

It is an arithmetic number, because the mean of its divisors is an integer number (16468920).

Almost surely, 2^68409351 is an apocalyptic number.

68409351 is a deficient number, since it is larger than the sum of its proper divisors (30404169).

68409351 is a wasteful number, since it uses less digits than its factorization.

68409351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7601045 (or 7601042 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 68409351 is about 8270.9945593018. The cubic root of 68409351 is about 408.9829062904.

The spelling of 68409351 in words is "sixty-eight million, four hundred nine thousand, three hundred fifty-one".