269561989 has 8 divisors (see below), whose sum is σ = 283430520. Its totient is φ = 255998400.

The previous prime is 269561977. The next prime is 269561993. The reversal of 269561989 is 989165962.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 44100 + 269517889 = 210^2 + 16417^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 269561989 - 2⁷ = 269561861 is a prime.

It is a super-2 number, since 2×269561989² = 145327331827272242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (269561959) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74422 + ... + 77959.

It is an arithmetic number, because the mean of its divisors is an integer number (35428815).

Almost surely, 2^269561989 is an apocalyptic number.

269561989 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

269561989 is a deficient number, since it is larger than the sum of its proper divisors (13868531).

269561989 is a wasteful number, since it uses less digits than its factorization.

269561989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152471.

The product of its digits is 2099520, while the sum is 55.

The square root of 269561989 is about 16418.3430649990. The cubic root of 269561989 is about 645.9807118818.

The spelling of 269561989 in words is "two hundred sixty-nine million, five hundred sixty-one thousand, nine hundred eighty-nine".