1690174009 has 2 divisors, whose sum is σ = 1690174010. Its totient is φ = 1690174008.

The previous prime is 1690174007. The next prime is 1690174049. The reversal of 1690174009 is 9004710961.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1299242025 + 390931984 = 36045^2 + 19772^2 .

It is an emirp because it is prime and its reverse (9004710961) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1690174009 - 2¹ = 1690174007 is a prime.

Together with 1690174007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1690174001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845087004 + 845087005.

It is an arithmetic number, because the mean of its divisors is an integer number (845087005).

Almost surely, 2^1690174009 is an apocalyptic number.

It is an amenable number.

1690174009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690174009 is an equidigital number, since it uses as much as digits as its factorization.

1690174009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1690174009 is about 41111.7259306880. The cubic root of 1690174009 is about 1191.1793052148.

The spelling of 1690174009 in words is "one billion, six hundred ninety million, one hundred seventy-four thousand, nine".