269921989 has 2 divisors, whose sum is σ = 269921990. Its totient is φ = 269921988.

The previous prime is 269921957. The next prime is 269922001. The reversal of 269921989 is 989129962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254945089 + 14976900 = 15967^2 + 3870^2 .

It is a cyclic number.

It is not a de Polignac number, because 269921989 - 2⁵ = 269921957 is a prime.

It is a super-2 number, since 2×269921989² = 145715760291432242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (269921489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134960994 + 134960995.

It is an arithmetic number, because the mean of its divisors is an integer number (134960995).

Almost surely, 2^269921989 is an apocalyptic number.

It is an amenable number.

269921989 is a deficient number, since it is larger than the sum of its proper divisors (1).

269921989 is an equidigital number, since it uses as much as digits as its factorization.

269921989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1259712, while the sum is 55.

The square root of 269921989 is about 16429.3027545298. The cubic root of 269921989 is about 646.2681530118.

The spelling of 269921989 in words is "two hundred sixty-nine million, nine hundred twenty-one thousand, nine hundred eighty-nine".