512820009 has 24 divisors (see below), whose sum is σ = 803030592. Its totient is φ = 313480800.

The previous prime is 512820001. The next prime is 512820017. The reversal of 512820009 is 900028215.

It is an interprime number because it is at equal distance from previous prime (512820001) and next prime (512820017).

It is not a de Polignac number, because 512820009 - 2³ = 512820001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (512820001) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3154 + ... + 32180.

It is an arithmetic number, because the mean of its divisors is an integer number (33459608).

Almost surely, 2^512820009 is an apocalyptic number.

It is an amenable number.

512820009 is a deficient number, since it is larger than the sum of its proper divisors (290210583).

512820009 is a wasteful number, since it uses less digits than its factorization.

512820009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29197 (or 29194 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 512820009 is about 22645.5295588335. The cubic root of 512820009 is about 800.4268602183.

The spelling of 512820009 in words is "five hundred twelve million, eight hundred twenty thousand, nine".