2258309 has 4 divisors (see below), whose sum is σ = 2275680. Its totient is φ = 2240940.

The previous prime is 2258299. The next prime is 2258323. The reversal of 2258309 is 9038522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9038522 = 2 ⋅4519261.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2258309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2258329) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8489 + ... + 8750.

It is an arithmetic number, because the mean of its divisors is an integer number (568920).

2^2258309 is an apocalyptic number.

It is an amenable number.

2258309 is a deficient number, since it is larger than the sum of its proper divisors (17371).

2258309 is a wasteful number, since it uses less digits than its factorization.

2258309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17370.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 2258309 is about 1502.7671143594. The cubic root of 2258309 is about 131.1981733399.

The spelling of 2258309 in words is "two million, two hundred fifty-eight thousand, three hundred nine".