68993406 has 24 divisors (see below), whose sum is σ = 153133344. Its totient is φ = 22436640.

The previous prime is 68993401. The next prime is 68993411. The reversal of 68993406 is 60439986.

It is an interprime number because it is at equal distance from previous prime (68993401) and next prime (68993411).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68993401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46006 + ... + 47481.

It is an arithmetic number, because the mean of its divisors is an integer number (6380556).

Almost surely, 2^68993406 is an apocalyptic number.

68993406 is an abundant number, since it is smaller than the sum of its proper divisors (84139938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68993406 is a wasteful number, since it uses less digits than its factorization.

68993406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93536 (or 93533 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 68993406 is about 8306.2269412772. The cubic root of 68993406 is about 410.1435269860.

The spelling of 68993406 in words is "sixty-eight million, nine hundred ninety-three thousand, four hundred six".