68400897 has 4 divisors (see below), whose sum is σ = 91201200. Its totient is φ = 45600596.

The previous prime is 68400889. The next prime is 68400907. The reversal of 68400897 is 79800486.

It is a happy number.

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 68400897 - 2³ = 68400889 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68400847) 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 3 ways as a sum of consecutive naturals, for example, 11400147 + ... + 11400152.

It is an arithmetic number, because the mean of its divisors is an integer number (22800300).

Almost surely, 2^68400897 is an apocalyptic number.

It is an amenable number.

68400897 is a deficient number, since it is larger than the sum of its proper divisors (22800303).

68400897 is a wasteful number, since it uses less digits than its factorization.

68400897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22800302.

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 68400897 is about 8270.4834804260. The cubic root of 68400897 is about 408.9660582821.

The spelling of 68400897 in words is "sixty-eight million, four hundred thousand, eight hundred ninety-seven".