136242989 has 8 divisors (see below), whose sum is σ = 139321728. Its totient is φ = 133171840.

The previous prime is 136242973. The next prime is 136243021. The reversal of 136242989 is 989242631.

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 136242989 - 2⁴ = 136242973 is a prime.

It is a super-3 number, since 3×136242989³ (a number of 25 digits) contains 333 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 (136242919) 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, 49949 + ... + 52605.

It is an arithmetic number, because the mean of its divisors is an integer number (17415216).

Almost surely, 2^136242989 is an apocalyptic number.

It is an amenable number.

136242989 is a deficient number, since it is larger than the sum of its proper divisors (3078739).

136242989 is a wasteful number, since it uses less digits than its factorization.

136242989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3795.

The product of its digits is 186624, while the sum is 44.

The square root of 136242989 is about 11672.3172078212. The cubic root of 136242989 is about 514.5624070575.

The spelling of 136242989 in words is "one hundred thirty-six million, two hundred forty-two thousand, nine hundred eighty-nine".