25973643 has 4 divisors (see below), whose sum is σ = 34631528. Its totient is φ = 17315760.

The previous prime is 25973641. The next prime is 25973653. The reversal of 25973643 is 34637952.

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

It is not a de Polignac number, because 25973643 - 2¹ = 25973641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25973641) 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, 4328938 + ... + 4328943.

It is an arithmetic number, because the mean of its divisors is an integer number (8657882).

Almost surely, 2^25973643 is an apocalyptic number.

25973643 is a deficient number, since it is larger than the sum of its proper divisors (8657885).

25973643 is an equidigital number, since it uses as much as digits as its factorization.

25973643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8657884.

The product of its digits is 136080, while the sum is 39.

The square root of 25973643 is about 5096.4343417727. The cubic root of 25973643 is about 296.1494672143.

The spelling of 25973643 in words is "twenty-five million, nine hundred seventy-three thousand, six hundred forty-three".