136434123 has 24 divisors (see below), whose sum is σ = 226388448. Its totient is φ = 77559552.

The previous prime is 136434121. The next prime is 136434127. The reversal of 136434123 is 321434631.

136434123 is a `hidden beast` number, since 1 + 3 + 643 + 4 + 12 + 3 = 666.

It is not a de Polignac number, because 136434123 - 2¹ = 136434121 is a prime.

It is a super-2 number, since 2×136434123² = 37228539837558258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (136434121) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6915 + ... + 17907.

It is an arithmetic number, because the mean of its divisors is an integer number (9432852).

Almost surely, 2^136434123 is an apocalyptic number.

136434123 is a deficient number, since it is larger than the sum of its proper divisors (89954325).

136434123 is a wasteful number, since it uses less digits than its factorization.

136434123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11203 (or 11200 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 136434123 is about 11680.5018299729. The cubic root of 136434123 is about 514.8029195322.

Adding to 136434123 its reverse (321434631), we get a palindrome (457868754).

It can be divided in two parts, 13643 and 4123, that added together give a triangular number (17766 = T₁₈₈).

The spelling of 136434123 in words is "one hundred thirty-six million, four hundred thirty-four thousand, one hundred twenty-three".