2069639 has 16 divisors (see below), whose sum is σ = 2497824. Its totient is φ = 1689600.

The previous prime is 2069629. The next prime is 2069647. The reversal of 2069639 is 9369602.

2069639 = 42² + 43² + ... + 184².

It is not a de Polignac number, because 2069639 - 2⁸ = 2069383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2069599 and 2069608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2069629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5687 + ... + 6039.

It is an arithmetic number, because the mean of its divisors is an integer number (156114).

2^2069639 is an apocalyptic number.

2069639 is a deficient number, since it is larger than the sum of its proper divisors (428185).

2069639 is a wasteful number, since it uses less digits than its factorization.

2069639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 2069639 is about 1438.6239953511. The cubic root of 2069639 is about 127.4377807406.

The spelling of 2069639 in words is "two million, sixty-nine thousand, six hundred thirty-nine".