2009912825 has 6 divisors (see below), whose sum is σ = 2492291934. Its totient is φ = 1607930240.

The previous prime is 2009912761. The next prime is 2009912843. The reversal of 2009912825 is 5282199002.

It can be written as a sum of positive squares in 3 ways, for example, as 69422224 + 1940490601 = 8332^2 + 44051^2 .

It is not a de Polignac number, because 2009912825 - 2⁶ = 2009912761 is a prime.

It is a super-3 number, since 3×2009912825³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 40198232 + ... + 40198281.

It is an arithmetic number, because the mean of its divisors is an integer number (415381989).

Almost surely, 2^2009912825 is an apocalyptic number.

2009912825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2009912825 is a deficient number, since it is larger than the sum of its proper divisors (482379109).

2009912825 is an equidigital number, since it uses as much as digits as its factorization.

2009912825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80396523 (or 80396518 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 38.

The square root of 2009912825 is about 44832.0513137644. The cubic root of 2009912825 is about 1261.9991831189. Note that the first 3 decimals are identical.

The spelling of 2009912825 in words is "two billion, nine million, nine hundred twelve thousand, eight hundred twenty-five".