25901819 has 2 divisors, whose sum is σ = 25901820. Its totient is φ = 25901818.

The previous prime is 25901803. The next prime is 25901831. The reversal of 25901819 is 91810952.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25901819 - 2⁴ = 25901803 is a prime.

It is a super-2 number, since 2×25901819² = 1341808455017522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25901839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12950909 + 12950910.

It is an arithmetic number, because the mean of its divisors is an integer number (12950910).

Almost surely, 2^25901819 is an apocalyptic number.

25901819 is a deficient number, since it is larger than the sum of its proper divisors (1).

25901819 is an equidigital number, since it uses as much as digits as its factorization.

25901819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 35.

The square root of 25901819 is about 5089.3829684943. The cubic root of 25901819 is about 295.8762379792.

The spelling of 25901819 in words is "twenty-five million, nine hundred one thousand, eight hundred nineteen".