2639137 has 4 divisors (see below), whose sum is σ = 2642500. Its totient is φ = 2635776.

The previous prime is 2639111. The next prime is 2639149. The reversal of 2639137 is 7319362.

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 331776 + 2307361 = 576^2 + 1519^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2639137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2639099 and 2639108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2639107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193 + ... + 2305.

It is an arithmetic number, because the mean of its divisors is an integer number (660625).

2^2639137 is an apocalyptic number.

It is an amenable number.

2639137 is a deficient number, since it is larger than the sum of its proper divisors (3363).

2639137 is a wasteful number, since it uses less digits than its factorization.

2639137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3362.

The product of its digits is 6804, while the sum is 31.

The square root of 2639137 is about 1624.5420893286. The cubic root of 2639137 is about 138.1934031225.

The spelling of 2639137 in words is "two million, six hundred thirty-nine thousand, one hundred thirty-seven".