136785749 has 2 divisors, whose sum is σ = 136785750. Its totient is φ = 136785748.

The previous prime is 136785673. The next prime is 136785763. The reversal of 136785749 is 947587631.

136785749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79299025 + 57486724 = 8905^2 + 7582^2 .

It is an emirp because it is prime and its reverse (947587631) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-136785749 is a prime.

It is a super-2 number, since 2×136785749² = 37420682258982002, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 136785697 and 136785706.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (136785149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68392874 + 68392875.

It is an arithmetic number, because the mean of its divisors is an integer number (68392875).

Almost surely, 2^136785749 is an apocalyptic number.

It is an amenable number.

136785749 is a deficient number, since it is larger than the sum of its proper divisors (1).

136785749 is an equidigital number, since it uses as much as digits as its factorization.

136785749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1270080, while the sum is 50.

The square root of 136785749 is about 11695.5439805081. The cubic root of 136785749 is about 515.2448001985.

The spelling of 136785749 in words is "one hundred thirty-six million, seven hundred eighty-five thousand, seven hundred forty-nine".