1906696009 has 2 divisors, whose sum is σ = 1906696010. Its totient is φ = 1906696008.

The previous prime is 1906695977. The next prime is 1906696061. The reversal of 1906696009 is 9006966091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1709574409 + 197121600 = 41347^2 + 14040^2 .

It is a cyclic number.

It is not a de Polignac number, because 1906696009 - 2⁵ = 1906695977 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1906696009.

It is not a weakly prime, because it can be changed into another prime (1906691009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 953348004 + 953348005.

It is an arithmetic number, because the mean of its divisors is an integer number (953348005).

Almost surely, 2^1906696009 is an apocalyptic number.

It is an amenable number.

1906696009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1906696009 is an equidigital number, since it uses as much as digits as its factorization.

1906696009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 157464, while the sum is 46.

The square root of 1906696009 is about 43665.7303729137. The cubic root of 1906696009 is about 1240.0156104955.

The spelling of 1906696009 in words is "one billion, nine hundred six million, six hundred ninety-six thousand, nine".