25016399 has 2 divisors, whose sum is σ = 25016400. Its totient is φ = 25016398.

The previous prime is 25016389. The next prime is 25016423. The reversal of 25016399 is 99361052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25016399 - 2⁸ = 25016143 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25016309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12508199 + 12508200.

It is an arithmetic number, because the mean of its divisors is an integer number (12508200).

Almost surely, 2^25016399 is an apocalyptic number.

25016399 is a deficient number, since it is larger than the sum of its proper divisors (1).

25016399 is an equidigital number, since it uses as much as digits as its factorization.

25016399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 25016399 is about 5001.6396311610. The cubic root of 25016399 is about 292.4656944694.

The spelling of 25016399 in words is "twenty-five million, sixteen thousand, three hundred ninety-nine".