1425623609 has 2 divisors, whose sum is σ = 1425623610. Its totient is φ = 1425623608.

The previous prime is 1425623603. The next prime is 1425623623. The reversal of 1425623609 is 9063265241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1003115584 + 422508025 = 31672^2 + 20555^2 .

It is an emirp because it is prime and its reverse (9063265241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1425623609 - 2⁴ = 1425623593 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1425623603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 712811804 + 712811805.

It is an arithmetic number, because the mean of its divisors is an integer number (712811805).

Almost surely, 2^1425623609 is an apocalyptic number.

It is an amenable number.

1425623609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1425623609 is an equidigital number, since it uses as much as digits as its factorization.

1425623609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 1425623609 is about 37757.4311758626. The cubic root of 1425623609 is about 1125.4726860408.

The spelling of 1425623609 in words is "one billion, four hundred twenty-five million, six hundred twenty-three thousand, six hundred nine".