425087609 has 4 divisors (see below), whose sum is σ = 426851700. Its totient is φ = 423323520.

The previous prime is 425087591. The next prime is 425087617. The reversal of 425087609 is 906780524.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 304153600 + 120934009 = 17440^2 + 10997^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425087609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425087629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881684 + ... + 882165.

It is an arithmetic number, because the mean of its divisors is an integer number (106712925).

Almost surely, 2^425087609 is an apocalyptic number.

It is an amenable number.

425087609 is a deficient number, since it is larger than the sum of its proper divisors (1764091).

425087609 is a wasteful number, since it uses less digits than its factorization.

425087609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1764090.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 425087609 is about 20617.6528489545. The cubic root of 425087609 is about 751.8989561922.

The spelling of 425087609 in words is "four hundred twenty-five million, eighty-seven thousand, six hundred nine".