2009391145 has 8 divisors (see below), whose sum is σ = 2418426504. Its totient is φ = 1602741504.

The previous prime is 2009391133. The next prime is 2009391169. The reversal of 2009391145 is 5411939002.

It can be written as a sum of positive squares in 4 ways, for example, as 3426201 + 2005964944 = 1851^2 + 44788^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2009391145 - 2²⁹ = 1472520233 is a prime.

It is a super-2 number, since 2×2009391145² = 8075305547208822050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2009391145.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594574 + ... + 597943.

It is an arithmetic number, because the mean of its divisors is an integer number (302303313).

Almost surely, 2^2009391145 is an apocalyptic number.

It is an amenable number.

2009391145 is a deficient number, since it is larger than the sum of its proper divisors (409035359).

2009391145 is a wasteful number, since it uses less digits than its factorization.

2009391145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192859.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 2009391145 is about 44826.2327772477. The cubic root of 2009391145 is about 1261.8899882169.

The spelling of 2009391145 in words is "two billion, nine million, three hundred ninety-one thousand, one hundred forty-five".