25972919 has 4 divisors (see below), whose sum is σ = 29683344. Its totient is φ = 22262496.

The previous prime is 25972913. The next prime is 25972949. The reversal of 25972919 is 91927952.

It is a happy number.

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 25972919 - 2²⁰ = 24924343 is a prime.

It is a super-2 number, since 2×25972919² = 1349185042761122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25972919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25972913) 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, 1855202 + ... + 1855215.

It is an arithmetic number, because the mean of its divisors is an integer number (7420836).

Almost surely, 2^25972919 is an apocalyptic number.

25972919 is a deficient number, since it is larger than the sum of its proper divisors (3710425).

25972919 is an equidigital number, since it uses as much as digits as its factorization.

25972919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3710424.

The product of its digits is 102060, while the sum is 44.

The square root of 25972919 is about 5096.3633112250. The cubic root of 25972919 is about 296.1467155247.

The spelling of 25972919 in words is "twenty-five million, nine hundred seventy-two thousand, nine hundred nineteen".