1979161 has 4 divisors (see below), whose sum is σ = 2025232. Its totient is φ = 1933092.

The previous prime is 1979149. The next prime is 1979171. The reversal of 1979161 is 1619791.

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.

It is a cyclic number.

It is not a de Polignac number, because 1979161 - 2⁵ = 1979129 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1979101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22971 + ... + 23056.

It is an arithmetic number, because the mean of its divisors is an integer number (506308).

2^1979161 is an apocalyptic number.

It is an amenable number.

1979161 is a deficient number, since it is larger than the sum of its proper divisors (46071).

1979161 is an equidigital number, since it uses as much as digits as its factorization.

1979161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46070.

The product of its digits is 3402, while the sum is 34.

The square root of 1979161 is about 1406.8265706902. The cubic root of 1979161 is about 125.5529847224.

The spelling of 1979161 in words is "one million, nine hundred seventy-nine thousand, one hundred sixty-one".