136748231 has 4 divisors (see below), whose sum is σ = 136810464. Its totient is φ = 136686000.

The previous prime is 136748207. The next prime is 136748251. The reversal of 136748231 is 132847631.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136748231 is a prime.

It is a super-2 number, since 2×136748231² = 37400157363258722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136748191 and 136748200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136748251) 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 3 ways as a sum of consecutive naturals, for example, 27695 + ... + 32256.

It is an arithmetic number, because the mean of its divisors is an integer number (34202616).

Almost surely, 2^136748231 is an apocalyptic number.

136748231 is a deficient number, since it is larger than the sum of its proper divisors (62233).

136748231 is an equidigital number, since it uses as much as digits as its factorization.

136748231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62232.

The product of its digits is 24192, while the sum is 35.

The square root of 136748231 is about 11693.9399263037. The cubic root of 136748231 is about 515.1976882680.

The spelling of 136748231 in words is "one hundred thirty-six million, seven hundred forty-eight thousand, two hundred thirty-one".