4206639949 has 4 divisors (see below), whose sum is σ = 4211130364. Its totient is φ = 4202149536.

The previous prime is 4206639887. The next prime is 4206639961. The reversal of 4206639949 is 9499366024.

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

It can be written as a sum of positive squares in 2 ways, for example, as 847857924 + 3358782025 = 29118^2 + 57955^2 .

It is a cyclic number.

It is not a de Polignac number, because 4206639949 - 2¹¹ = 4206637901 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4206639896 and 4206639905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4206639989) 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, 2243802 + ... + 2245675.

It is an arithmetic number, because the mean of its divisors is an integer number (1052782591).

Almost surely, 2^4206639949 is an apocalyptic number.

It is an amenable number.

4206639949 is a deficient number, since it is larger than the sum of its proper divisors (4490415).

4206639949 is an equidigital number, since it uses as much as digits as its factorization.

4206639949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4490414.

The product of its (nonzero) digits is 2519424, while the sum is 52.

The square root of 4206639949 is about 64858.6150715539. The cubic root of 4206639949 is about 1614.2784431115.

The spelling of 4206639949 in words is "four billion, two hundred six million, six hundred thirty-nine thousand, nine hundred forty-nine".