3973656897 has 12 divisors (see below), whose sum is σ = 6559687680. Its totient is φ = 2270661048.

The previous prime is 3973656887. The next prime is 3973656913. The reversal of 3973656897 is 7986563793.

3973656897 is a `hidden beast` number, since 39 + 7 + 36 + 568 + 9 + 7 = 666.

It is not a de Polignac number, because 3973656897 - 2⁴ = 3973656881 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63), and also a Moran number because the ratio is a prime number: 63073919 = 3973656897 / (3 + 9 + 7 + 3 + 6 + 5 + 6 + 8 + 9 + 7).

It is not an unprimeable number, because it can be changed into a prime (3973656887) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31536897 + ... + 31537022.

It is an arithmetic number, because the mean of its divisors is an integer number (546640640).

Almost surely, 2^3973656897 is an apocalyptic number.

It is an amenable number.

3973656897 is a deficient number, since it is larger than the sum of its proper divisors (2586030783).

3973656897 is a wasteful number, since it uses less digits than its factorization.

3973656897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63073932 (or 63073929 counting only the distinct ones).

The product of its digits is 51438240, while the sum is 63.

The square root of 3973656897 is about 63036.9486650488. The cubic root of 3973656897 is about 1583.9086181308.

The spelling of 3973656897 in words is "three billion, nine hundred seventy-three million, six hundred fifty-six thousand, eight hundred ninety-seven".