136181969 has 8 divisors (see below), whose sum is σ = 169785408. Its totient is φ = 106115760.

The previous prime is 136181959. The next prime is 136182023. The reversal of 136181969 is 969181631.

It is a happy number.

136181969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 136181969 - 2⁴ = 136181953 is a prime.

It is a super-2 number, since 2×136181969² = 37091057361433922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136181959) 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, 884222 + ... + 884375.

It is an arithmetic number, because the mean of its divisors is an integer number (21223176).

Almost surely, 2^136181969 is an apocalyptic number.

It is an amenable number.

136181969 is a deficient number, since it is larger than the sum of its proper divisors (33603439).

136181969 is a wasteful number, since it uses less digits than its factorization.

136181969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1768615.

The product of its digits is 69984, while the sum is 44.

The square root of 136181969 is about 11669.7030382097. The cubic root of 136181969 is about 514.4855754910.

The spelling of 136181969 in words is "one hundred thirty-six million, one hundred eighty-one thousand, nine hundred sixty-nine".