5439447637 has 4 divisors (see below), whose sum is σ = 5857866700. Its totient is φ = 5021028576.

The previous prime is 5439447539. The next prime is 5439447649. The reversal of 5439447637 is 7367449345.

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 1429898596 + 4009549041 = 37814^2 + 63321^2 .

It is a cyclic number.

It is not a de Polignac number, because 5439447637 - 2¹¹ = 5439445589 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 (5439447667) 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, 209209512 + ... + 209209537.

It is an arithmetic number, because the mean of its divisors is an integer number (1464466675).

Almost surely, 2^5439447637 is an apocalyptic number.

It is an amenable number.

5439447637 is a deficient number, since it is larger than the sum of its proper divisors (418419063).

5439447637 is a wasteful number, since it uses less digits than its factorization.

5439447637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418419062.

The product of its digits is 7620480, while the sum is 52.

The square root of 5439447637 is about 73752.6110520841. The cubic root of 5439447637 is about 1758.6723412105.

The spelling of 5439447637 in words is "five billion, four hundred thirty-nine million, four hundred forty-seven thousand, six hundred thirty-seven".