25998437 has 2 divisors, whose sum is σ = 25998438. Its totient is φ = 25998436.

The previous prime is 25998433. The next prime is 25998449. The reversal of 25998437 is 73489952.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25411681 + 586756 = 5041^2 + 766^2 .

It is a cyclic number.

It is not a de Polignac number, because 25998437 - 2² = 25998433 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25998391 and 25998400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25998431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12999218 + 12999219.

It is an arithmetic number, because the mean of its divisors is an integer number (12999219).

Almost surely, 2^25998437 is an apocalyptic number.

It is an amenable number.

25998437 is a deficient number, since it is larger than the sum of its proper divisors (1).

25998437 is an equidigital number, since it uses as much as digits as its factorization.

25998437 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 47.

The square root of 25998437 is about 5098.8662465297. The cubic root of 25998437 is about 296.2436703354.

The spelling of 25998437 in words is "twenty-five million, nine hundred ninety-eight thousand, four hundred thirty-seven".