2139819 has 16 divisors (see below), whose sum is σ = 3166464. Its totient is φ = 1274400.

The previous prime is 2139817. The next prime is 2139829. The reversal of 2139819 is 9189312.

It is not a de Polignac number, because 2139819 - 2¹ = 2139817 is a prime.

It is a super-2 number, since 2×2139819² = 9157650705522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a self number, because there is not a number n which added to its sum of digits gives 2139819.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139811) 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, 1482 + ... + 2544.

It is an arithmetic number, because the mean of its divisors is an integer number (197904).

2^2139819 is an apocalyptic number.

2139819 is a deficient number, since it is larger than the sum of its proper divisors (1026645).

2139819 is a wasteful number, since it uses less digits than its factorization.

2139819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138.

The product of its digits is 3888, while the sum is 33.

The square root of 2139819 is about 1462.8120179982. The cubic root of 2139819 is about 128.8622410173.

The spelling of 2139819 in words is "two million, one hundred thirty-nine thousand, eight hundred nineteen".