25540913 has 2 divisors, whose sum is σ = 25540914. Its totient is φ = 25540912.

The previous prime is 25540897. The next prime is 25540927. The reversal of 25540913 is 31904552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21827584 + 3713329 = 4672^2 + 1927^2 .

It is a cyclic number.

It is not a de Polignac number, because 25540913 - 2⁴ = 25540897 is a prime.

It is not a weakly prime, because it can be changed into another prime (25540513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12770456 + 12770457.

It is an arithmetic number, because the mean of its divisors is an integer number (12770457).

Almost surely, 2^25540913 is an apocalyptic number.

It is an amenable number.

25540913 is a deficient number, since it is larger than the sum of its proper divisors (1).

25540913 is an equidigital number, since it uses as much as digits as its factorization.

25540913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 25540913 is about 5053.8018362417. The cubic root of 25540913 is about 294.4955969145.

The spelling of 25540913 in words is "twenty-five million, five hundred forty thousand, nine hundred thirteen".