136408531 has 8 divisors (see below), whose sum is σ = 158538240. Its totient is φ = 114939528.

The previous prime is 136408507. The next prime is 136408553. The reversal of 136408531 is 135804631.

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 136408531 - 2⁵ = 136408499 is a prime.

It is a super-2 number, since 2×136408531² = 37214574659155922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 136408493 and 136408502.

It is not an unprimeable number, because it can be changed into a prime (136408031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164731 + ... + 165556.

It is an arithmetic number, because the mean of its divisors is an integer number (19817280).

Almost surely, 2^136408531 is an apocalyptic number.

136408531 is a deficient number, since it is larger than the sum of its proper divisors (22129709).

136408531 is an equidigital number, since it uses as much as digits as its factorization.

136408531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330353.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 136408531 is about 11679.4062777181. The cubic root of 136408531 is about 514.7707290022.

The spelling of 136408531 in words is "one hundred thirty-six million, four hundred eight thousand, five hundred thirty-one".