2146779 has 6 divisors (see below), whose sum is σ = 3100916. Its totient is φ = 1431180.

The previous prime is 2146763. The next prime is 2146787. The reversal of 2146779 is 9776412.

It is a happy number.

It is not a de Polignac number, because 2146779 - 2⁴ = 2146763 is a prime.

It is a Duffinian number.

2146779 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2146759) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119257 + ... + 119274.

2^2146779 is an apocalyptic number.

2146779 is a deficient number, since it is larger than the sum of its proper divisors (954137).

2146779 is a wasteful number, since it uses less digits than its factorization.

2146779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238537 (or 238534 counting only the distinct ones).

The product of its digits is 21168, while the sum is 36.

The square root of 2146779 is about 1465.1890662983. The cubic root of 2146779 is about 129.0018027511.

The spelling of 2146779 in words is "two million, one hundred forty-six thousand, seven hundred seventy-nine".