68191958 has 16 divisors (see below), whose sum is σ = 103265280. Its totient is φ = 33772200.

The previous prime is 68191951. The next prime is 68191993. The reversal of 68191958 is 85919186.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68191951) 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, 158003 + ... + 158433.

It is an arithmetic number, because the mean of its divisors is an integer number (6454080).

Almost surely, 2^68191958 is an apocalyptic number.

68191958 is a deficient number, since it is larger than the sum of its proper divisors (35073322).

68191958 is a wasteful number, since it uses less digits than its factorization.

68191958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1003.

The product of its digits is 155520, while the sum is 47.

The square root of 68191958 is about 8257.8422121036. The cubic root of 68191958 is about 408.5492210975.

The spelling of 68191958 in words is "sixty-eight million, one hundred ninety-one thousand, nine hundred fifty-eight".