2509317 has 6 divisors (see below), whose sum is σ = 3624582. Its totient is φ = 1672872.

The previous prime is 2509313. The next prime is 2509333. The reversal of 2509317 is 7139052.

It can be written as a sum of positive squares in only one way, i.e., 1425636 + 1083681 = 1194^2 + 1041^2 .

It is not a de Polignac number, because 2509317 - 2² = 2509313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2509313) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 139398 + ... + 139415.

It is an arithmetic number, because the mean of its divisors is an integer number (604097).

2^2509317 is an apocalyptic number.

It is an amenable number.

2509317 is a deficient number, since it is larger than the sum of its proper divisors (1115265).

2509317 is a wasteful number, since it uses less digits than its factorization.

2509317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278819 (or 278816 counting only the distinct ones).

The product of its (nonzero) digits is 1890, while the sum is 27.

The square root of 2509317 is about 1584.0823842212. The cubic root of 2509317 is about 135.8892733405.

The spelling of 2509317 in words is "two million, five hundred nine thousand, three hundred seventeen".