68753391 has 16 divisors (see below), whose sum is σ = 104891904. Its totient is φ = 39240864.

The previous prime is 68753387. The next prime is 68753401. The reversal of 68753391 is 19335786.

It is not a de Polignac number, because 68753391 - 2² = 68753387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68753791) 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, 24345 + ... + 27021.

It is an arithmetic number, because the mean of its divisors is an integer number (6555744).

Almost surely, 2^68753391 is an apocalyptic number.

68753391 is a deficient number, since it is larger than the sum of its proper divisors (36138513).

68753391 is a wasteful number, since it uses less digits than its factorization.

68753391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3910.

The product of its digits is 136080, while the sum is 42.

The square root of 68753391 is about 8291.7664583610. The cubic root of 68753391 is about 409.6673705070.

The spelling of 68753391 in words is "sixty-eight million, seven hundred fifty-three thousand, three hundred ninety-one".