425397569 has 2 divisors, whose sum is σ = 425397570. Its totient is φ = 425397568.

The previous prime is 425397529. The next prime is 425397571. The reversal of 425397569 is 965793524.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 413919025 + 11478544 = 20345^2 + 3388^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425397569 is a prime.

It is a super-2 number, since 2×425397569² = 361926183422219522, which contains 22 as substring.

Together with 425397571, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (425397529) 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, 212698784 + 212698785.

It is an arithmetic number, because the mean of its divisors is an integer number (212698785).

Almost surely, 2^425397569 is an apocalyptic number.

It is an amenable number.

425397569 is a deficient number, since it is larger than the sum of its proper divisors (1).

425397569 is an equidigital number, since it uses as much as digits as its factorization.

425397569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 50.

The square root of 425397569 is about 20625.1683387070. The cubic root of 425397569 is about 752.0816651776.

The spelling of 425397569 in words is "four hundred twenty-five million, three hundred ninety-seven thousand, five hundred sixty-nine".