2009376917 has 4 divisors (see below), whose sum is σ = 2009466816. Its totient is φ = 2009287020.

The previous prime is 2009376883. The next prime is 2009376973. The reversal of 2009376917 is 7196739002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7196739002 = 2 ⋅3598369501.

It is a cyclic number.

It is not a de Polignac number, because 2009376917 - 2¹⁸ = 2009114773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2009376617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17492 + ... + 65762.

It is an arithmetic number, because the mean of its divisors is an integer number (502366704).

Almost surely, 2^2009376917 is an apocalyptic number.

It is an amenable number.

2009376917 is a deficient number, since it is larger than the sum of its proper divisors (89899).

2009376917 is an equidigital number, since it uses as much as digits as its factorization.

2009376917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89898.

The product of its (nonzero) digits is 142884, while the sum is 44.

The square root of 2009376917 is about 44826.0740752522. The cubic root of 2009376917 is about 1261.8870098332.

The spelling of 2009376917 in words is "two billion, nine million, three hundred seventy-six thousand, nine hundred seventeen".