68378431 has 6 divisors (see below), whose sum is σ = 75159896. Its totient is φ = 62162100.

The previous prime is 68378419. The next prime is 68378441. The reversal of 68378431 is 13487386.

It is not a de Polignac number, because 68378431 - 2¹⁷ = 68247359 is a prime.

It is a super-2 number, since 2×68378431² = 9351219652043522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68378411) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 282435 + ... + 282676.

Almost surely, 2^68378431 is an apocalyptic number.

68378431 is a deficient number, since it is larger than the sum of its proper divisors (6781465).

68378431 is a wasteful number, since it uses less digits than its factorization.

68378431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565133 (or 565122 counting only the distinct ones).

The product of its digits is 96768, while the sum is 40.

The square root of 68378431 is about 8269.1251653364. The cubic root of 68378431 is about 408.9212789593.

The spelling of 68378431 in words is "sixty-eight million, three hundred seventy-eight thousand, four hundred thirty-one".