3997681346 has 4 divisors (see below), whose sum is σ = 5996522022. Its totient is φ = 1998840672.

The previous prime is 3997681333. The next prime is 3997681399. The reversal of 3997681346 is 6431867993.

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

It can be written as a sum of positive squares in only one way, i.e., 3873693121 + 123988225 = 62239^2 + 11135^2 .

It is a super-2 number, since 2×3997681346² = 31962912288312743432, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3997681291 and 3997681300.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 999420335 + ... + 999420338.

Almost surely, 2^3997681346 is an apocalyptic number.

3997681346 is a deficient number, since it is larger than the sum of its proper divisors (1998840676).

3997681346 is a wasteful number, since it uses less digits than its factorization.

3997681346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998840675.

The product of its digits is 5878656, while the sum is 56.

The square root of 3997681346 is about 63227.2199768423. The cubic root of 3997681346 is about 1587.0942732012.

The spelling of 3997681346 in words is "three billion, nine hundred ninety-seven million, six hundred eighty-one thousand, three hundred forty-six".