2979649 has 2 divisors, whose sum is σ = 2979650. Its totient is φ = 2979648.

The previous prime is 2979623. The next prime is 2979653. The reversal of 2979649 is 9469792.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1979649 + 1000000 = 1407^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 2979649 - 2¹⁷ = 2848577 is a prime.

It is a Chen prime.

2979649 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2979599 and 2979608.

It is not a weakly prime, because it can be changed into another prime (2979619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1489824 + 1489825.

It is an arithmetic number, because the mean of its divisors is an integer number (1489825).

2^2979649 is an apocalyptic number.

It is an amenable number.

2979649 is a deficient number, since it is larger than the sum of its proper divisors (1).

2979649 is an equidigital number, since it uses as much as digits as its factorization.

2979649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 2979649 is about 1726.1659827491. The cubic root of 2979649 is about 143.8980921207.

The spelling of 2979649 in words is "two million, nine hundred seventy-nine thousand, six hundred forty-nine".