135667889 has 4 divisors (see below), whose sum is σ = 155049024. Its totient is φ = 116286756.

The previous prime is 135667867. The next prime is 135667891. The reversal of 135667889 is 988766531.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 988766531 = 73 ⋅13544747.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135667889 is a prime.

It is a super-2 number, since 2×135667889² = 36811552211432642, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 135667889.

It is not an unprimeable number, because it can be changed into a prime (135667289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9690557 + ... + 9690570.

It is an arithmetic number, because the mean of its divisors is an integer number (38762256).

Almost surely, 2^135667889 is an apocalyptic number.

It is an amenable number.

135667889 is a deficient number, since it is larger than the sum of its proper divisors (19381135).

135667889 is an equidigital number, since it uses as much as digits as its factorization.

135667889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19381134.

The product of its digits is 2177280, while the sum is 53.

The square root of 135667889 is about 11647.6559444379. The cubic root of 135667889 is about 513.8373735440.

The spelling of 135667889 in words is "one hundred thirty-five million, six hundred sixty-seven thousand, eight hundred eighty-nine".