25870619 has 2 divisors, whose sum is σ = 25870620. Its totient is φ = 25870618.

The previous prime is 25870591. The next prime is 25870657. The reversal of 25870619 is 91607852.

It is an a-pointer prime, because the next prime (25870657) can be obtained adding 25870619 to its sum of digits (38).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25870619 is a prime.

It is a super-2 number, since 2×25870619² = 1338577854886322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25872619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12935309 + 12935310.

It is an arithmetic number, because the mean of its divisors is an integer number (12935310).

Almost surely, 2^25870619 is an apocalyptic number.

25870619 is a deficient number, since it is larger than the sum of its proper divisors (1).

25870619 is an equidigital number, since it uses as much as digits as its factorization.

25870619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 25870619 is about 5086.3168403079. The cubic root of 25870619 is about 295.7573911441.

The spelling of 25870619 in words is "twenty-five million, eight hundred seventy thousand, six hundred nineteen".