2009789577 has 16 divisors (see below), whose sum is σ = 3014228160. Its totient is φ = 1339858260.

The previous prime is 2009789567. The next prime is 2009789591. The reversal of 2009789577 is 7759879002.

It is not a de Polignac number, because 2009789577 - 2¹⁵ = 2009756809 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2009789567) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 457299 + ... + 461672.

It is an arithmetic number, because the mean of its divisors is an integer number (188389260).

Almost surely, 2^2009789577 is an apocalyptic number.

2009789577 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2009789577 is a deficient number, since it is larger than the sum of its proper divisors (1004438583).

2009789577 is an frugal number, since it uses more digits than its factorization.

2009789577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918992 (or 918974 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 54.

The square root of 2009789577 is about 44830.6767403750. The cubic root of 2009789577 is about 1261.9733872978.

The spelling of 2009789577 in words is "two billion, nine million, seven hundred eighty-nine thousand, five hundred seventy-seven".