2578913 has 4 divisors (see below), whose sum is σ = 2584368. Its totient is φ = 2573460.

The previous prime is 2578907. The next prime is 2578931. The reversal of 2578913 is 3198752.

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.

It is a cyclic number.

It is not a de Polignac number, because 2578913 - 2⁸ = 2578657 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 5⁹ + 7⁴ + 8⁵ + 9⁵ + 1 + 3¹² .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2578943) 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, 1943 + ... + 2988.

It is an arithmetic number, because the mean of its divisors is an integer number (646092).

2^2578913 is an apocalyptic number.

It is an amenable number.

2578913 is a deficient number, since it is larger than the sum of its proper divisors (5455).

2578913 is an equidigital number, since it uses as much as digits as its factorization.

2578913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5454.

The product of its digits is 15120, while the sum is 35.

The square root of 2578913 is about 1605.8994364530. The cubic root of 2578913 is about 137.1341325778.

The spelling of 2578913 in words is "two million, five hundred seventy-eight thousand, nine hundred thirteen".