1024172309 has 2 divisors, whose sum is σ = 1024172310. Its totient is φ = 1024172308.

The previous prime is 1024172297. The next prime is 1024172311. The reversal of 1024172309 is 9032714201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 732514225 + 291658084 = 27065^2 + 17078^2 .

It is a cyclic number.

It is not a de Polignac number, because 1024172309 - 2²⁴ = 1007395093 is a prime.

It is a Sophie Germain prime.

Together with 1024172311, it forms a pair of twin primes.

It is a Chen 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 (1024172339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512086154 + 512086155.

It is an arithmetic number, because the mean of its divisors is an integer number (512086155).

Almost surely, 2^1024172309 is an apocalyptic number.

It is an amenable number.

1024172309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1024172309 is an equidigital number, since it uses as much as digits as its factorization.

1024172309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 1024172309 is about 32002.6922148747. The cubic root of 1024172309 is about 1007.9933720931.

The spelling of 1024172309 in words is "one billion, twenty-four million, one hundred seventy-two thousand, three hundred nine".