3923644321 has 3 divisors (see below), whose sum is σ = 3923706961. Its totient is φ = 3923581682.

The previous prime is 3923644289. The next prime is 3923644367. The reversal of 3923644321 is 1234463293.

The square root of 3923644321 is 62639.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1234463293 = 7 ⋅176351899.

It is not a de Polignac number, because 3923644321 - 2⁵ = 3923644289 is a prime.

It is a super-3 number, since 3×3923644321³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3923644721) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 31320 + ... + 93958.

Almost surely, 2^3923644321 is an apocalyptic number.

3923644321 is the 62639-th square number.

3923644321 is the 31320-th centered octagonal number.

It is an amenable number.

3923644321 is a deficient number, since it is larger than the sum of its proper divisors (62640).

3923644321 is an frugal number, since it uses more digits than its factorization.

3923644321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125278 (or 62639 counting only the distinct ones).

The product of its digits is 93312, while the sum is 37.

The cubic root of 3923644321 is about 1577.2355013756.

The spelling of 3923644321 in words is "three billion, nine hundred twenty-three million, six hundred forty-four thousand, three hundred twenty-one".