68771997 has 20 divisors (see below), whose sum is σ = 117410656. Its totient is φ = 39297960.

The previous prime is 68771971. The next prime is 68772013. The reversal of 68771997 is 79917786.

It is not a de Polignac number, because 68771997 - 2¹⁶ = 68706461 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 (68771917) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 60079 + ... + 61212.

Almost surely, 2^68771997 is an apocalyptic number.

It is an amenable number.

68771997 is a deficient number, since it is larger than the sum of its proper divisors (48638659).

68771997 is a wasteful number, since it uses less digits than its factorization.

68771997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121310 (or 121301 counting only the distinct ones).

The product of its digits is 1333584, while the sum is 54.

The square root of 68771997 is about 8292.8883388118. Note that the first 3 decimals coincide. The cubic root of 68771997 is about 409.7043218171.

The spelling of 68771997 in words is "sixty-eight million, seven hundred seventy-one thousand, nine hundred ninety-seven".