25720619 has 2 divisors, whose sum is σ = 25720620. Its totient is φ = 25720618.

The previous prime is 25720613. The next prime is 25720627. The reversal of 25720619 is 91602752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25720619 - 2⁸ = 25720363 is a prime.

It is a super-2 number, since 2×25720619² = 1323100483486322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25720613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12860309 + 12860310.

It is an arithmetic number, because the mean of its divisors is an integer number (12860310).

Almost surely, 2^25720619 is an apocalyptic number.

25720619 is a deficient number, since it is larger than the sum of its proper divisors (1).

25720619 is an equidigital number, since it uses as much as digits as its factorization.

25720619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 25720619 is about 5071.5499603179. The cubic root of 25720619 is about 295.1846741786.

The spelling of 25720619 in words is "twenty-five million, seven hundred twenty thousand, six hundred nineteen".