1023989269 has 2 divisors, whose sum is σ = 1023989270. Its totient is φ = 1023989268.

The previous prime is 1023989261. The next prime is 1023989293. The reversal of 1023989269 is 9629893201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 704902500 + 319086769 = 26550^2 + 17863^2 .

It is an emirp because it is prime and its reverse (9629893201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1023989269 - 2³ = 1023989261 is a prime.

It is a super-2 number, since 2×1023989269² = 2097108046054308722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1023989261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511994634 + 511994635.

It is an arithmetic number, because the mean of its divisors is an integer number (511994635).

Almost surely, 2^1023989269 is an apocalyptic number.

It is an amenable number.

1023989269 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023989269 is an equidigital number, since it uses as much as digits as its factorization.

1023989269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 419904, while the sum is 49.

The square root of 1023989269 is about 31999.8323276857. The cubic root of 1023989269 is about 1007.9333190149.

The spelling of 1023989269 in words is "one billion, twenty-three million, nine hundred eighty-nine thousand, two hundred sixty-nine".