1649879 has 12 divisors (see below), whose sum is σ = 2094408. Its totient is φ = 1285200.

The previous prime is 1649863. The next prime is 1649887. The reversal of 1649879 is 9789461.

It is not a de Polignac number, because 1649879 - 2⁴ = 1649863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 992 + ... + 2069.

It is an arithmetic number, because the mean of its divisors is an integer number (174534).

2^1649879 is an apocalyptic number.

1649879 is a deficient number, since it is larger than the sum of its proper divisors (444529).

1649879 is a wasteful number, since it uses less digits than its factorization.

1649879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3086 (or 3079 counting only the distinct ones).

The product of its digits is 108864, while the sum is 44.

The square root of 1649879 is about 1284.4761578169. The cubic root of 1649879 is about 118.1636864599.

The spelling of 1649879 in words is "one million, six hundred forty-nine thousand, eight hundred seventy-nine".