1979853 has 4 divisors (see below), whose sum is σ = 2639808. Its totient is φ = 1319900.

The previous prime is 1979827. The next prime is 1979891. The reversal of 1979853 is 3589791.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3589791 = 3 ⋅1196597.

It is a cyclic number.

It is not a de Polignac number, because 1979853 - 2¹⁴ = 1963469 is a prime.

It is a D-number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1979893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 329973 + ... + 329978.

It is an arithmetic number, because the mean of its divisors is an integer number (659952).

2^1979853 is an apocalyptic number.

It is an amenable number.

1979853 is a deficient number, since it is larger than the sum of its proper divisors (659955).

1979853 is an equidigital number, since it uses as much as digits as its factorization.

1979853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659954.

The product of its digits is 68040, while the sum is 42.

The square root of 1979853 is about 1407.0724928020. The cubic root of 1979853 is about 125.5676159292.

The spelling of 1979853 in words is "one million, nine hundred seventy-nine thousand, eight hundred fifty-three".