25917319 has 2 divisors, whose sum is σ = 25917320. Its totient is φ = 25917318.

The previous prime is 25917301. The next prime is 25917373. The reversal of 25917319 is 91371952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25917319 - 2¹¹ = 25915271 is a prime.

It is a super-2 number, since 2×25917319² = 1343414848295522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25917379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12958659 + 12958660.

It is an arithmetic number, because the mean of its divisors is an integer number (12958660).

Almost surely, 2^25917319 is an apocalyptic number.

25917319 is a deficient number, since it is larger than the sum of its proper divisors (1).

25917319 is an equidigital number, since it uses as much as digits as its factorization.

25917319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17010, while the sum is 37.

The square root of 25917319 is about 5090.9055186676. The cubic root of 25917319 is about 295.9352449960.

It can be divided in two parts, 259 and 17319, that added together give a triangular number (17578 = T₁₈₇).

The spelling of 25917319 in words is "twenty-five million, nine hundred seventeen thousand, three hundred nineteen".