25497623 has 4 divisors (see below), whose sum is σ = 25537680. Its totient is φ = 25457568.

The previous prime is 25497599. The next prime is 25497643. The reversal of 25497623 is 32679452.

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 25497623 - 2¹² = 25493527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25497643) 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, 19058 + ... + 20351.

It is an arithmetic number, because the mean of its divisors is an integer number (6384420).

Almost surely, 2^25497623 is an apocalyptic number.

25497623 is a deficient number, since it is larger than the sum of its proper divisors (40057).

25497623 is an equidigital number, since it uses as much as digits as its factorization.

25497623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40056.

The product of its digits is 90720, while the sum is 38.

The square root of 25497623 is about 5049.5171056251. The cubic root of 25497623 is about 294.3291199122.

The spelling of 25497623 in words is "twenty-five million, four hundred ninety-seven thousand, six hundred twenty-three".