25016389 has 2 divisors, whose sum is σ = 25016390. Its totient is φ = 25016388.

The previous prime is 25016323. The next prime is 25016399. The reversal of 25016389 is 98361052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19096900 + 5919489 = 4370^2 + 2433^2 .

It is a cyclic number.

It is not a de Polignac number, because 25016389 - 2⁷ = 25016261 is a prime.

It is an alternating number because its digits alternate between even and odd.

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, 12508194 + 12508195.

It is an arithmetic number, because the mean of its divisors is an integer number (12508195).

Almost surely, 2^25016389 is an apocalyptic number.

It is an amenable number.

25016389 is a deficient number, since it is larger than the sum of its proper divisors (1).

25016389 is an equidigital number, since it uses as much as digits as its factorization.

25016389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 34.

The square root of 25016389 is about 5001.6386314887. The cubic root of 25016389 is about 292.4656554995.

The spelling of 25016389 in words is "twenty-five million, sixteen thousand, three hundred eighty-nine".