1009880309 has 2 divisors, whose sum is σ = 1009880310. Its totient is φ = 1009880308.

The previous prime is 1009880281. The next prime is 1009880317. The reversal of 1009880309 is 9030889001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 843728209 + 166152100 = 29047^2 + 12890^2 .

It is a cyclic number.

It is not a de Polignac number, because 1009880309 - 2²⁸ = 741444853 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1009880329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 504940154 + 504940155.

It is an arithmetic number, because the mean of its divisors is an integer number (504940155).

Almost surely, 2^1009880309 is an apocalyptic number.

It is an amenable number.

1009880309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1009880309 is an equidigital number, since it uses as much as digits as its factorization.

1009880309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1009880309 is about 31778.6140194943. The cubic root of 1009880309 is about 1003.2826487594.

The spelling of 1009880309 in words is "one billion, nine million, eight hundred eighty thousand, three hundred nine".