64971208 has 8 divisors (see below), whose sum is σ = 121821030. Its totient is φ = 32485600.

The previous prime is 64971197. The next prime is 64971209. The reversal of 64971208 is 80217946.

It can be written as a sum of positive squares in only one way, i.e., 63712324 + 1258884 = 7982^2 + 1122^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (64971209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4060693 + ... + 4060708.

Almost surely, 2^64971208 is an apocalyptic number.

It is an amenable number.

64971208 is a deficient number, since it is larger than the sum of its proper divisors (56849822).

64971208 is a wasteful number, since it uses less digits than its factorization.

64971208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8121407 (or 8121403 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 64971208 is about 8060.4719464806. The cubic root of 64971208 is about 402.0132005599.

The spelling of 64971208 in words is "sixty-four million, nine hundred seventy-one thousand, two hundred eight".