68919797 has 4 divisors (see below), whose sum is σ = 69750240. Its totient is φ = 68089356.

The previous prime is 68919791. The next prime is 68919817. The reversal of 68919797 is 79791986.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68919797 - 2¹² = 68915701 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 (68919791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 415097 + ... + 415262.

It is an arithmetic number, because the mean of its divisors is an integer number (17437560).

Almost surely, 2^68919797 is an apocalyptic number.

It is an amenable number.

68919797 is a deficient number, since it is larger than the sum of its proper divisors (830443).

68919797 is an equidigital number, since it uses as much as digits as its factorization.

68919797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830442.

The product of its digits is 1714608, while the sum is 56.

The square root of 68919797 is about 8301.7948059441. The cubic root of 68919797 is about 409.9976145013.

It can be divided in two parts, 6891979 and 7, that added together give a palindrome (6891986).

The spelling of 68919797 in words is "sixty-eight million, nine hundred nineteen thousand, seven hundred ninety-seven".