135489469 has 2 divisors, whose sum is σ = 135489470. Its totient is φ = 135489468.

The previous prime is 135489467. The next prime is 135489491. The reversal of 135489469 is 964984531.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72080100 + 63409369 = 8490^2 + 7963^2 .

It is a cyclic number.

It is not a de Polignac number, because 135489469 - 2¹ = 135489467 is a prime.

It is a super-2 number, since 2×135489469² = 36714792419803922, which contains 22 as substring.

Together with 135489467, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135489467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67744734 + 67744735.

It is an arithmetic number, because the mean of its divisors is an integer number (67744735).

Almost surely, 2^135489469 is an apocalyptic number.

It is an amenable number.

135489469 is a deficient number, since it is larger than the sum of its proper divisors (1).

135489469 is an equidigital number, since it uses as much as digits as its factorization.

135489469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 933120, while the sum is 49.

The square root of 135489469 is about 11639.9943728509. The cubic root of 135489469 is about 513.6120215615.

The spelling of 135489469 in words is "one hundred thirty-five million, four hundred eighty-nine thousand, four hundred sixty-nine".