2749609 has 2 divisors, whose sum is σ = 2749610. Its totient is φ = 2749608.

The previous prime is 2749589. The next prime is 2749639. The reversal of 2749609 is 9069472.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2650384 + 99225 = 1628^2 + 315^2 .

It is a cyclic number.

It is not a de Polignac number, because 2749609 - 2¹⁷ = 2618537 is a prime.

It is a Chen prime.

It is equal to p₁₉₉₉₇₂ and since 2749609 and 199972 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (2749639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1374804 + 1374805.

It is an arithmetic number, because the mean of its divisors is an integer number (1374805).

2^2749609 is an apocalyptic number.

It is an amenable number.

2749609 is a deficient number, since it is larger than the sum of its proper divisors (1).

2749609 is an equidigital number, since it uses as much as digits as its factorization.

2749609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 2749609 is about 1658.1945000512. The cubic root of 2749609 is about 140.0953262339.

The spelling of 2749609 in words is "two million, seven hundred forty-nine thousand, six hundred nine".