64068397 has 4 divisors (see below), whose sum is σ = 64207836. Its totient is φ = 63928960.

The previous prime is 64068391. The next prime is 64068419. The reversal of 64068397 is 79386046.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6702921 + 57365476 = 2589^2 + 7574^2 .

It is a cyclic number.

It is not a de Polignac number, because 64068397 - 2⁷ = 64068269 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 (64068391) 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, 69028 + ... + 69949.

It is an arithmetic number, because the mean of its divisors is an integer number (16051959).

Almost surely, 2^64068397 is an apocalyptic number.

It is an amenable number.

64068397 is a deficient number, since it is larger than the sum of its proper divisors (139439).

64068397 is a wasteful number, since it uses less digits than its factorization.

64068397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139438.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 64068397 is about 8004.2736709835. The cubic root of 64068397 is about 400.1424430189.

The spelling of 64068397 in words is "sixty-four million, sixty-eight thousand, three hundred ninety-seven".