4138443437 has 4 divisors (see below), whose sum is σ = 4138579836. Its totient is φ = 4138307040.

The previous prime is 4138443373. The next prime is 4138443443. The reversal of 4138443437 is 7343448314.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 3093473161 + 1044970276 = 55619^2 + 32326^2 .

It is a cyclic number.

It is not a de Polignac number, because 4138443437 - 2⁶ = 4138443373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4138443394 and 4138443403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4138443037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137 + ... + 90977.

It is an arithmetic number, because the mean of its divisors is an integer number (1034644959).

Almost surely, 2^4138443437 is an apocalyptic number.

It is an amenable number.

4138443437 is a deficient number, since it is larger than the sum of its proper divisors (136399).

4138443437 is an equidigital number, since it uses as much as digits as its factorization.

4138443437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136398.

The product of its digits is 387072, while the sum is 41.

The square root of 4138443437 is about 64330.7347773986. The cubic root of 4138443437 is about 1605.5075095272.

The spelling of 4138443437 in words is "four billion, one hundred thirty-eight million, four hundred forty-three thousand, four hundred thirty-seven".