2009170697 has 2 divisors, whose sum is σ = 2009170698. Its totient is φ = 2009170696.

The previous prime is 2009170673. The next prime is 2009170733. The reversal of 2009170697 is 7960719002.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1597121296 + 412049401 = 39964^2 + 20299^2 .

It is a cyclic number.

It is not a de Polignac number, because 2009170697 - 2¹⁴ = 2009154313 is a prime.

It is not a weakly prime, because it can be changed into another prime (2009170297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1004585348 + 1004585349.

It is an arithmetic number, because the mean of its divisors is an integer number (1004585349).

Almost surely, 2^2009170697 is an apocalyptic number.

It is an amenable number.

2009170697 is a deficient number, since it is larger than the sum of its proper divisors (1).

2009170697 is an equidigital number, since it uses as much as digits as its factorization.

2009170697 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47628, while the sum is 41.

The square root of 2009170697 is about 44823.7737924865. The cubic root of 2009170697 is about 1261.8438396943.

Adding to 2009170697 its reverse (7960719002), we get a palindrome (9969889699).

The spelling of 2009170697 in words is "two billion, nine million, one hundred seventy thousand, six hundred ninety-seven".