136431433 has 4 divisors (see below), whose sum is σ = 137220228. Its totient is φ = 135642640.

The previous prime is 136431413. The next prime is 136431437. The reversal of 136431433 is 334134631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 334134631 = 53 ⋅6304427.

It can be written as a sum of positive squares in 2 ways, for example, as 97456384 + 38975049 = 9872^2 + 6243^2 .

It is a cyclic number.

It is not a de Polignac number, because 136431433 - 2¹⁷ = 136300361 is a prime.

It is a super-2 number, since 2×136431433² = 37227071820866978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136431437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394138 + ... + 394483.

It is an arithmetic number, because the mean of its divisors is an integer number (34305057).

Almost surely, 2^136431433 is an apocalyptic number.

It is an amenable number.

136431433 is a deficient number, since it is larger than the sum of its proper divisors (788795).

136431433 is an equidigital number, since it uses as much as digits as its factorization.

136431433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788794.

The product of its digits is 7776, while the sum is 28.

The square root of 136431433 is about 11680.3866802431. The cubic root of 136431433 is about 514.7995361436.

The spelling of 136431433 in words is "one hundred thirty-six million, four hundred thirty-one thousand, four hundred thirty-three".