1022123309 has 2 divisors, whose sum is σ = 1022123310. Its totient is φ = 1022123308.

The previous prime is 1022123303. The next prime is 1022123327. The reversal of 1022123309 is 9033212201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 972067684 + 50055625 = 31178^2 + 7075^2 .

It is a cyclic number.

It is not a de Polignac number, because 1022123309 - 2⁴ = 1022123293 is a prime.

It is a super-2 number, since 2×1022123309² = 2089472117602218962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1022123303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511061654 + 511061655.

It is an arithmetic number, because the mean of its divisors is an integer number (511061655).

Almost surely, 2^1022123309 is an apocalyptic number.

It is an amenable number.

1022123309 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022123309 is an equidigital number, since it uses as much as digits as its factorization.

1022123309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1022123309 is about 31970.6632555535. The cubic root of 1022123309 is about 1007.3207127194.

The spelling of 1022123309 in words is "one billion, twenty-two million, one hundred twenty-three thousand, three hundred nine".