25978603 has 4 divisors (see below), whose sum is σ = 29689840. Its totient is φ = 22267368.

The previous prime is 25978591. The next prime is 25978607. The reversal of 25978603 is 30687952.

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

It is a cyclic number.

It is not a de Polignac number, because 25978603 - 2⁵ = 25978571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25978607) 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, 1855608 + ... + 1855621.

It is an arithmetic number, because the mean of its divisors is an integer number (7422460).

Almost surely, 2^25978603 is an apocalyptic number.

25978603 is a deficient number, since it is larger than the sum of its proper divisors (3711237).

25978603 is an equidigital number, since it uses as much as digits as its factorization.

25978603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3711236.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 25978603 is about 5096.9209332694. The cubic root of 25978603 is about 296.1683171932.

The spelling of 25978603 in words is "twenty-five million, nine hundred seventy-eight thousand, six hundred three".