269490989 has 2 divisors, whose sum is σ = 269490990. Its totient is φ = 269490988.

The previous prime is 269490959. The next prime is 269491009. The reversal of 269490989 is 989094962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 257345764 + 12145225 = 16042^2 + 3485^2 .

It is a cyclic number.

It is not a de Polignac number, because 269490989 - 2²⁰ = 268442413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (269490959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134745494 + 134745495.

It is an arithmetic number, because the mean of its divisors is an integer number (134745495).

Almost surely, 2^269490989 is an apocalyptic number.

It is an amenable number.

269490989 is a deficient number, since it is larger than the sum of its proper divisors (1).

269490989 is an equidigital number, since it uses as much as digits as its factorization.

269490989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2519424, while the sum is 56.

The square root of 269490989 is about 16416.1807068514. The cubic root of 269490989 is about 645.9239918944.

The spelling of 269490989 in words is "two hundred sixty-nine million, four hundred ninety thousand, nine hundred eighty-nine".