68377491 has 36 divisors (see below), whose sum is σ = 123741072. Its totient is φ = 36064224.

The previous prime is 68377487. The next prime is 68377499. The reversal of 68377491 is 19477386.

It is not a de Polignac number, because 68377491 - 2² = 68377487 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68377499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 231 + ... + 11696.

It is an arithmetic number, because the mean of its divisors is an integer number (3437252).

Almost surely, 2^68377491 is an apocalyptic number.

68377491 is a deficient number, since it is larger than the sum of its proper divisors (55363581).

68377491 is a wasteful number, since it uses less digits than its factorization.

68377491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11960 (or 11950 counting only the distinct ones).

The product of its digits is 254016, while the sum is 45.

The square root of 68377491 is about 8269.0683272059. The cubic root of 68377491 is about 408.9194051337.

It can be divided in two parts, 683774 and 91, that added together give a triangular number (683865 = T₁₁₆₉).

The spelling of 68377491 in words is "sixty-eight million, three hundred seventy-seven thousand, four hundred ninety-one".