3639972213 has 24 divisors (see below), whose sum is σ = 5362156800. Its totient is φ = 2378544480.

The previous prime is 3639972173. The next prime is 3639972223. The reversal of 3639972213 is 3122799363.

3639972213 is a `hidden beast` number, since 3 + 639 + 9 + 7 + 2 + 2 + 1 + 3 = 666.

It is not a de Polignac number, because 3639972213 - 2¹² = 3639968117 is a prime.

It is a super-2 number, since 2×3639972213² = 26498795422824234738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3639972223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 584088 + ... + 590286.

It is an arithmetic number, because the mean of its divisors is an integer number (223423200).

Almost surely, 2^3639972213 is an apocalyptic number.

It is an amenable number.

3639972213 is a deficient number, since it is larger than the sum of its proper divisors (1722184587).

3639972213 is a wasteful number, since it uses less digits than its factorization.

3639972213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7489 (or 7486 counting only the distinct ones).

The product of its digits is 367416, while the sum is 45.

The square root of 3639972213 is about 60332.1822330338. The cubic root of 3639972213 is about 1538.2704218979.

The spelling of 3639972213 in words is "three billion, six hundred thirty-nine million, nine hundred seventy-two thousand, two hundred thirteen".