2564393 has 4 divisors (see below), whose sum is σ = 2761668. Its totient is φ = 2367120.

The previous prime is 2564381. The next prime is 2564407. The reversal of 2564393 is 3934652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 595984 + 1968409 = 772^2 + 1403^2 .

It is a cyclic number.

It is not a de Polignac number, because 2564393 - 2⁶ = 2564329 is a prime.

It is a super-2 number, since 2×2564393² = 13152222916898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2564323) 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, 98618 + ... + 98643.

It is an arithmetic number, because the mean of its divisors is an integer number (690417).

2^2564393 is an apocalyptic number.

It is an amenable number.

2564393 is a deficient number, since it is larger than the sum of its proper divisors (197275).

2564393 is a wasteful number, since it uses less digits than its factorization.

2564393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197274.

The product of its digits is 19440, while the sum is 32.

The square root of 2564393 is about 1601.3722240629. The cubic root of 2564393 is about 136.8762802296.

The spelling of 2564393 in words is "two million, five hundred sixty-four thousand, three hundred ninety-three".