64404197 has 16 divisors (see below), whose sum is σ = 76634880. Its totient is φ = 53352000.

The previous prime is 64404173. The next prime is 64404199. The reversal of 64404197 is 79140446.

It is not a de Polignac number, because 64404197 - 2⁶ = 64404133 is a prime.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64404199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8447 + ... + 14147.

It is an arithmetic number, because the mean of its divisors is an integer number (4789680).

Almost surely, 2^64404197 is an apocalyptic number.

It is an amenable number.

64404197 is a deficient number, since it is larger than the sum of its proper divisors (12230683).

64404197 is a wasteful number, since it uses less digits than its factorization.

64404197 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5804.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 64404197 is about 8025.2225514312. Note that the first 3 decimals coincide. The cubic root of 64404197 is about 400.8403105426.

The spelling of 64404197 in words is "sixty-four million, four hundred four thousand, one hundred ninety-seven".