25999423 has 2 divisors, whose sum is σ = 25999424. Its totient is φ = 25999422.

The previous prime is 25999411. The next prime is 25999427. The reversal of 25999423 is 32499952.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25999423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25999423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25999427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12999711 + 12999712.

It is an arithmetic number, because the mean of its divisors is an integer number (12999712).

Almost surely, 2^25999423 is an apocalyptic number.

25999423 is a deficient number, since it is larger than the sum of its proper divisors (1).

25999423 is an equidigital number, since it uses as much as digits as its factorization.

25999423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 43.

The square root of 25999423 is about 5098.9629337739. The cubic root of 25999423 is about 296.2474153370.

The spelling of 25999423 in words is "twenty-five million, nine hundred ninety-nine thousand, four hundred twenty-three".