1039955209 has 2 divisors, whose sum is σ = 1039955210. Its totient is φ = 1039955208.

The previous prime is 1039955207. The next prime is 1039955219. The reversal of 1039955209 is 9025599301.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 948332025 + 91623184 = 30795^2 + 9572^2 .

It is a cyclic number.

It is not a de Polignac number, because 1039955209 - 2¹ = 1039955207 is a prime.

Together with 1039955207, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1039955207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 519977604 + 519977605.

It is an arithmetic number, because the mean of its divisors is an integer number (519977605).

Almost surely, 2^1039955209 is an apocalyptic number.

It is an amenable number.

1039955209 is a deficient number, since it is larger than the sum of its proper divisors (1).

1039955209 is an equidigital number, since it uses as much as digits as its factorization.

1039955209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109350, while the sum is 43.

The square root of 1039955209 is about 32248.3365307422. The cubic root of 1039955209 is about 1013.1448586040.

The spelling of 1039955209 in words is "one billion, thirty-nine million, nine hundred fifty-five thousand, two hundred nine".