136787749 has 12 divisors (see below), whose sum is σ = 158169184. Its totient is φ = 115882272.

The previous prime is 136787741. The next prime is 136787759. The reversal of 136787749 is 947787631.

It is not a de Polignac number, because 136787749 - 2³ = 136787741 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136787696 and 136787705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136787741) 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 11 ways as a sum of consecutive naturals, for example, 54214 + ... + 56680.

Almost surely, 2^136787749 is an apocalyptic number.

It is an amenable number.

136787749 is a deficient number, since it is larger than the sum of its proper divisors (21381435).

136787749 is an frugal number, since it uses more digits than its factorization.

136787749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2652 (or 2563 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 52.

The square root of 136787749 is about 11695.6294828453. The cubic root of 136787749 is about 515.2473113874.

The spelling of 136787749 in words is "one hundred thirty-six million, seven hundred eighty-seven thousand, seven hundred forty-nine".