136723739 has 2 divisors, whose sum is σ = 136723740. Its totient is φ = 136723738.

The previous prime is 136723711. The next prime is 136723771. The reversal of 136723739 is 937327631.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136723739 is a prime.

It is a super-2 number, since 2×136723739² = 37386761612280242, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 136723696 and 136723705.

It is not a weakly prime, because it can be changed into another prime (136723039) 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, 68361869 + 68361870.

It is an arithmetic number, because the mean of its divisors is an integer number (68361870).

Almost surely, 2^136723739 is an apocalyptic number.

136723739 is a deficient number, since it is larger than the sum of its proper divisors (1).

136723739 is an equidigital number, since it uses as much as digits as its factorization.

136723739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 142884, while the sum is 41.

The square root of 136723739 is about 11692.8926703361. The cubic root of 136723739 is about 515.1669286375.

The spelling of 136723739 in words is "one hundred thirty-six million, seven hundred twenty-three thousand, seven hundred thirty-nine".