900025997809 has 9 divisors (see below), whose sum is σ = 904945038361. Its totient is φ = 895133567380.

The previous prime is 900025997791. The next prime is 900025997831. The reversal of 900025997809 is 908799520009.

The square root of 900025997809 is 948697.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 900025997809 - 2⁵ = 900025997777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (900025997839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 181198644 + ... + 181203610.

Almost surely, 2^900025997809 is an apocalyptic number.

900025997809 is the 948697-th square number.

900025997809 is the 474349-th centered octagonal number.

It is an amenable number.

900025997809 is a deficient number, since it is larger than the sum of its proper divisors (4919040552).

900025997809 is an frugal number, since it uses more digits than its factorization.

900025997809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10316 (or 5158 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 58.

The spelling of 900025997809 in words is "nine hundred billion, twenty-five million, nine hundred ninety-seven thousand, eight hundred nine".