68157943 has 16 divisors (see below), whose sum is σ = 79994880. Its totient is φ = 56860416.

The previous prime is 68157937. The next prime is 68157977. The reversal of 68157943 is 34975186.

It is a cyclic number.

It is not a de Polignac number, because 68157943 - 2²¹ = 66060791 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68157943.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68157043) 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, 72903 + ... + 73831.

It is an arithmetic number, because the mean of its divisors is an integer number (4999680).

Almost surely, 2^68157943 is an apocalyptic number.

68157943 is a deficient number, since it is larger than the sum of its proper divisors (11836937).

68157943 is a wasteful number, since it uses less digits than its factorization.

68157943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206.

The product of its digits is 181440, while the sum is 43.

The square root of 68157943 is about 8255.7823978106. The cubic root of 68157943 is about 408.4812799822.

The spelling of 68157943 in words is "sixty-eight million, one hundred fifty-seven thousand, nine hundred forty-three".