2139623 has 4 divisors (see below), whose sum is σ = 2156088. Its totient is φ = 2123160.

The previous prime is 2139611. The next prime is 2139653. The reversal of 2139623 is 3269312.

2139623 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2139623 - 2⁴ = 2139607 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2139592 and 2139601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139653) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8036 + ... + 8297.

It is an arithmetic number, because the mean of its divisors is an integer number (539022).

2^2139623 is an apocalyptic number.

2139623 is a deficient number, since it is larger than the sum of its proper divisors (16465).

2139623 is a wasteful number, since it uses less digits than its factorization.

2139623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16464.

The product of its digits is 1944, while the sum is 26.

The square root of 2139623 is about 1462.7450222100. The cubic root of 2139623 is about 128.8583064524.

The spelling of 2139623 in words is "two million, one hundred thirty-nine thousand, six hundred twenty-three".