68158831 has 8 divisors (see below), whose sum is σ = 77719824. Its totient is φ = 59214720.

The previous prime is 68158829. The next prime is 68158837. The reversal of 68158831 is 13885186.

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 68158831 - 2¹ = 68158829 is a prime.

It is a super-2 number, since 2×68158831² = 9291252486573122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68158837) 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, 153985 + ... + 154426.

It is an arithmetic number, because the mean of its divisors is an integer number (9714978).

Almost surely, 2^68158831 is an apocalyptic number.

68158831 is a deficient number, since it is larger than the sum of its proper divisors (9560993).

68158831 is a wasteful number, since it uses less digits than its factorization.

68158831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308441.

The product of its digits is 46080, while the sum is 40.

The square root of 68158831 is about 8255.8361781227. The cubic root of 68158831 is about 408.4830539491.

The spelling of 68158831 in words is "sixty-eight million, one hundred fifty-eight thousand, eight hundred thirty-one".