6431040949 has 4 divisors (see below), whose sum is σ = 6437624364. Its totient is φ = 6424457536.

The previous prime is 6431040907. The next prime is 6431040983. The reversal of 6431040949 is 9490401346.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9490401346 = 2 ⋅4745200673.

It can be written as a sum of positive squares in 2 ways, for example, as 6205500625 + 225540324 = 78775^2 + 15018^2 .

It is a cyclic number.

It is not a de Polignac number, because 6431040949 - 2⁷ = 6431040821 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6431040349) 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, 3290242 + ... + 3292195.

It is an arithmetic number, because the mean of its divisors is an integer number (1609406091).

Almost surely, 2^6431040949 is an apocalyptic number.

It is an amenable number.

6431040949 is a deficient number, since it is larger than the sum of its proper divisors (6583415).

6431040949 is an equidigital number, since it uses as much as digits as its factorization.

6431040949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6583414.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 6431040949 is about 80193.7712606160. The cubic root of 6431040949 is about 1859.6323462062.

The spelling of 6431040949 in words is "six billion, four hundred thirty-one million, forty thousand, nine hundred forty-nine".