3992213857 has 4 divisors (see below), whose sum is σ = 4020934960. Its totient is φ = 3963492756.

The previous prime is 3992213843. The next prime is 3992213867. The reversal of 3992213857 is 7583122993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7583122993 = 22511 ⋅336863.

It is a cyclic number.

It is not a de Polignac number, because 3992213857 - 2²³ = 3983825249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3992213857.

It is not an unprimeable number, because it can be changed into a prime (3992213837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14360343 + ... + 14360620.

It is an arithmetic number, because the mean of its divisors is an integer number (1005233740).

Almost surely, 2^3992213857 is an apocalyptic number.

It is an amenable number.

3992213857 is a deficient number, since it is larger than the sum of its proper divisors (28721103).

3992213857 is a wasteful number, since it uses less digits than its factorization.

3992213857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28721102.

The product of its digits is 816480, while the sum is 49.

The square root of 3992213857 is about 63183.9683543223. The cubic root of 3992213857 is about 1586.3704053161.

The spelling of 3992213857 in words is "three billion, nine hundred ninety-two million, two hundred thirteen thousand, eight hundred fifty-seven".