25493613 has 4 divisors (see below), whose sum is σ = 33991488. Its totient is φ = 16995740.

The previous prime is 25493609. The next prime is 25493641. The reversal of 25493613 is 31639452.

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 25493613 - 2² = 25493609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25493113) 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, 4248933 + ... + 4248938.

It is an arithmetic number, because the mean of its divisors is an integer number (8497872).

Almost surely, 2^25493613 is an apocalyptic number.

It is an amenable number.

25493613 is a deficient number, since it is larger than the sum of its proper divisors (8497875).

25493613 is an equidigital number, since it uses as much as digits as its factorization.

25493613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8497874.

The product of its digits is 19440, while the sum is 33.

The square root of 25493613 is about 5049.1200223405. The cubic root of 25493613 is about 294.3136894326.

It can be divided in two parts, 25493 and 613, that added together give a triangular number (26106 = T₂₂₈).

The spelling of 25493613 in words is "twenty-five million, four hundred ninety-three thousand, six hundred thirteen".