136431863 has 8 divisors (see below), whose sum is σ = 141274800. Its totient is φ = 131598208.

The previous prime is 136431859. The next prime is 136431871. The reversal of 136431863 is 368134631.

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 136431863 - 2² = 136431859 is a prime.

It is a super-2 number, since 2×136431863² = 37227306483301538, which contains 22 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 (136433863) 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, 42623 + ... + 45711.

It is an arithmetic number, because the mean of its divisors is an integer number (17659350).

Almost surely, 2^136431863 is an apocalyptic number.

136431863 is a deficient number, since it is larger than the sum of its proper divisors (4842937).

136431863 is a wasteful number, since it uses less digits than its factorization.

136431863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4641.

The product of its digits is 31104, while the sum is 35.

The square root of 136431863 is about 11680.4050871534. The cubic root of 136431863 is about 514.8000769857.

The spelling of 136431863 in words is "one hundred thirty-six million, four hundred thirty-one thousand, eight hundred sixty-three".