2139617 has 4 divisors (see below), whose sum is σ = 2150676. Its totient is φ = 2128560.

The previous prime is 2139611. The next prime is 2139653. The reversal of 2139617 is 7169312.

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 1615441 + 524176 = 1271^2 + 724^2 .

It is a cyclic number.

It is not a de Polignac number, because 2139617 - 2¹⁰ = 2138593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2139617.

It is not an unprimeable number, because it can be changed into a prime (2139611) 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, 5234 + ... + 5627.

It is an arithmetic number, because the mean of its divisors is an integer number (537669).

2^2139617 is an apocalyptic number.

It is an amenable number.

2139617 is a deficient number, since it is larger than the sum of its proper divisors (11059).

2139617 is a wasteful number, since it uses less digits than its factorization.

2139617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11058.

The product of its digits is 2268, while the sum is 29.

The square root of 2139617 is about 1462.7429712701. The cubic root of 2139617 is about 128.8581860027.

The spelling of 2139617 in words is "two million, one hundred thirty-nine thousand, six hundred seventeen".