25984729 has 4 divisors (see below), whose sum is σ = 26029584. Its totient is φ = 25939876.

The previous prime is 25984711. The next prime is 25984741. The reversal of 25984729 is 92748952.

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 25984729 - 2⁵ = 25984697 is a prime.

It is a super-2 number, since 2×25984729² = 1350412282406882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25984709) 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, 21547 + ... + 22720.

It is an arithmetic number, because the mean of its divisors is an integer number (6507396).

Almost surely, 2^25984729 is an apocalyptic number.

It is an amenable number.

25984729 is a deficient number, since it is larger than the sum of its proper divisors (44855).

25984729 is an equidigital number, since it uses as much as digits as its factorization.

25984729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44854.

The product of its digits is 362880, while the sum is 46.

The square root of 25984729 is about 5097.5218488987. The cubic root of 25984729 is about 296.1915951259.

The spelling of 25984729 in words is "twenty-five million, nine hundred eighty-four thousand, seven hundred twenty-nine".