4139897 has 4 divisors (see below), whose sum is σ = 4144740. Its totient is φ = 4135056.

The previous prime is 4139881. The next prime is 4139899. The reversal of 4139897 is 7989314.

It is a happy number.

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 885481 + 3254416 = 941^2 + 1804^2 .

It is a cyclic number.

It is not a de Polignac number, because 4139897 - 2⁴ = 4139881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4139899) 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, 758 + ... + 2975.

It is an arithmetic number, because the mean of its divisors is an integer number (1036185).

Almost surely, 2^4139897 is an apocalyptic number.

It is an amenable number.

4139897 is a deficient number, since it is larger than the sum of its proper divisors (4843).

4139897 is a wasteful number, since it uses less digits than its factorization.

4139897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4842.

The product of its digits is 54432, while the sum is 41.

The square root of 4139897 is about 2034.6736839110. The cubic root of 4139897 is about 160.5695457256.

The spelling of 4139897 in words is "four million, one hundred thirty-nine thousand, eight hundred ninety-seven".