68140357 has 8 divisors (see below), whose sum is σ = 69253920. Its totient is φ = 67035600.

The previous prime is 68140307. The next prime is 68140361. The reversal of 68140357 is 75304186.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68140357 - 2⁷ = 68140229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68140307) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14394 + ... + 18532.

It is an arithmetic number, because the mean of its divisors is an integer number (8656740).

Almost surely, 2^68140357 is an apocalyptic number.

It is an amenable number.

68140357 is a deficient number, since it is larger than the sum of its proper divisors (1113563).

68140357 is a wasteful number, since it uses less digits than its factorization.

68140357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4403.

The product of its (nonzero) digits is 20160, while the sum is 34.

The square root of 68140357 is about 8254.7172574232. The cubic root of 68140357 is about 408.4461450716.

The spelling of 68140357 in words is "sixty-eight million, one hundred forty thousand, three hundred fifty-seven".