2917289 has 2 divisors, whose sum is σ = 2917290. Its totient is φ = 2917288.

The previous prime is 2917261. The next prime is 2917303. The reversal of 2917289 is 9827192.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2917264 + 25 = 1708^2 + 5^2 .

It is a cyclic number.

It is not a de Polignac number, because 2917289 - 2¹² = 2913193 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2917219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1458644 + 1458645.

It is an arithmetic number, because the mean of its divisors is an integer number (1458645).

2^2917289 is an apocalyptic number.

It is an amenable number.

2917289 is a deficient number, since it is larger than the sum of its proper divisors (1).

2917289 is an equidigital number, since it uses as much as digits as its factorization.

2917289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 38.

The square root of 2917289 is about 1708.0073184855. The cubic root of 2917289 is about 142.8871426044.

Subtracting 2917289 from its reverse (9827192), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 2917289 in words is "two million, nine hundred seventeen thousand, two hundred eighty-nine".