25993321 has 2 divisors, whose sum is σ = 25993322. Its totient is φ = 25993320.

The previous prime is 25993249. The next prime is 25993327. The reversal of 25993321 is 12339952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25361296 + 632025 = 5036^2 + 795^2 .

It is a cyclic number.

It is not a de Polignac number, because 25993321 - 2¹⁹ = 25469033 is a prime.

It is not a weakly prime, because it can be changed into another prime (25993327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12996660 + 12996661.

It is an arithmetic number, because the mean of its divisors is an integer number (12996661).

Almost surely, 2^25993321 is an apocalyptic number.

It is an amenable number.

25993321 is a deficient number, since it is larger than the sum of its proper divisors (1).

25993321 is an equidigital number, since it uses as much as digits as its factorization.

25993321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14580, while the sum is 34.

The square root of 25993321 is about 5098.3645416937. The cubic root of 25993321 is about 296.2242373462.

The spelling of 25993321 in words is "twenty-five million, nine hundred ninety-three thousand, three hundred twenty-one".