136443746 has 4 divisors (see below), whose sum is σ = 204665622. Its totient is φ = 68221872.

The previous prime is 136443743. The next prime is 136443757. The reversal of 136443746 is 647344631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 118048225 + 18395521 = 10865^2 + 4289^2 .

It is not an unprimeable number, because it can be changed into a prime (136443743) 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 as a sum of consecutive naturals, namely, 34110935 + ... + 34110938.

Almost surely, 2^136443746 is an apocalyptic number.

136443746 is a deficient number, since it is larger than the sum of its proper divisors (68221876).

136443746 is an equidigital number, since it uses as much as digits as its factorization.

136443746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68221875.

The product of its digits is 145152, while the sum is 38.

The square root of 136443746 is about 11680.9137485044. The cubic root of 136443746 is about 514.8150226432.

The spelling of 136443746 in words is "one hundred thirty-six million, four hundred forty-three thousand, seven hundred forty-six".