25511797 has 2 divisors, whose sum is σ = 25511798. Its totient is φ = 25511796.

The previous prime is 25511779. The next prime is 25511809. The reversal of 25511797 is 79711552.

Together with previous prime (25511779) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24690961 + 820836 = 4969^2 + 906^2 .

It is a cyclic number.

It is not a de Polignac number, because 25511797 - 2¹⁹ = 24987509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25511597) 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, 12755898 + 12755899.

It is an arithmetic number, because the mean of its divisors is an integer number (12755899).

Almost surely, 2^25511797 is an apocalyptic number.

It is an amenable number.

25511797 is a deficient number, since it is larger than the sum of its proper divisors (1).

25511797 is an equidigital number, since it uses as much as digits as its factorization.

25511797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22050, while the sum is 37.

The square root of 25511797 is about 5050.9204111726. The cubic root of 25511797 is about 294.3836485003.

The spelling of 25511797 in words is "twenty-five million, five hundred eleven thousand, seven hundred ninety-seven".