2219979 has 32 divisors (see below), whose sum is σ = 3456000. Its totient is φ = 1257984.

The previous prime is 2219977. The next prime is 2219999. The reversal of 2219979 is 9799122.

It is a happy number.

It is not a de Polignac number, because 2219979 - 2¹ = 2219977 is a prime.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2219977) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28062 + ... + 28140.

It is an arithmetic number, because the mean of its divisors is an integer number (108000).

2^2219979 is an apocalyptic number.

2219979 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

2219979 is a deficient number, since it is larger than the sum of its proper divisors (1236021).

2219979 is a wasteful number, since it uses less digits than its factorization.

2219979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147.

The product of its digits is 20412, while the sum is 39.

The square root of 2219979 is about 1489.9593954199. The cubic root of 2219979 is about 130.4516636654.

The spelling of 2219979 in words is "two million, two hundred nineteen thousand, nine hundred seventy-nine".