2979161 has 4 divisors (see below), whose sum is σ = 3009972. Its totient is φ = 2948352.

The previous prime is 2979149. The next prime is 2979173. The reversal of 2979161 is 1619792.

2979161 = 125² + 126² + ... + 221².

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2979149) and next prime (2979173).

It can be written as a sum of positive squares in 2 ways, for example, as 2088025 + 891136 = 1445^2 + 944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2979161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2979191) 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, 15260 + ... + 15453.

It is an arithmetic number, because the mean of its divisors is an integer number (752493).

2^2979161 is an apocalyptic number.

It is an amenable number.

2979161 is a deficient number, since it is larger than the sum of its proper divisors (30811).

2979161 is an equidigital number, since it uses as much as digits as its factorization.

2979161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30810.

The product of its digits is 6804, while the sum is 35.

The square root of 2979161 is about 1726.0246232311. The cubic root of 2979161 is about 143.8902359266.

The spelling of 2979161 in words is "two million, nine hundred seventy-nine thousand, one hundred sixty-one".