6437138 has 4 divisors (see below), whose sum is σ = 9655710. Its totient is φ = 3218568.

The previous prime is 6437131. The next prime is 6437141. The reversal of 6437138 is 8317346.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8317346 = 2 ⋅4158673.

It can be written as a sum of positive squares in only one way, i.e., 4739329 + 1697809 = 2177^2 + 1303^2 .

It is not an unprimeable number, because it can be changed into a prime (6437131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1609283 + ... + 1609286.

Almost surely, 2^6437138 is an apocalyptic number.

6437138 is a deficient number, since it is larger than the sum of its proper divisors (3218572).

6437138 is a wasteful number, since it uses less digits than its factorization.

6437138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3218571.

The product of its digits is 12096, while the sum is 32.

The square root of 6437138 is about 2537.1515524304. The cubic root of 6437138 is about 186.0219845290.

The spelling of 6437138 in words is "six million, four hundred thirty-seven thousand, one hundred thirty-eight".