25490919 has 4 divisors (see below), whose sum is σ = 33987896. Its totient is φ = 16993944.

The previous prime is 25490911. The next prime is 25490929. The reversal of 25490919 is 91909452.

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

It is not a de Polignac number, because 25490919 - 2³ = 25490911 is a prime.

It is a super-2 number, since 2×25490919² = 1299573902929122, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25490911) 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, 4248484 + ... + 4248489.

It is an arithmetic number, because the mean of its divisors is an integer number (8496974).

Almost surely, 2^25490919 is an apocalyptic number.

25490919 is a deficient number, since it is larger than the sum of its proper divisors (8496977).

25490919 is an equidigital number, since it uses as much as digits as its factorization.

25490919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8496976.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 25490919 is about 5048.8532361319. The cubic root of 25490919 is about 294.3033220122.

The spelling of 25490919 in words is "twenty-five million, four hundred ninety thousand, nine hundred nineteen".