136723769 has 24 divisors (see below), whose sum is σ = 175939848. Its totient is φ = 105235200.

The previous prime is 136723739. The next prime is 136723771. The reversal of 136723769 is 967327631.

It can be written as a sum of positive squares in 4 ways, for example, as 63792169 + 72931600 = 7987^2 + 8540^2 .

It is not a de Polignac number, because 136723769 - 2¹⁶ = 136658233 is a prime.

It is a super-2 number, since 2×136723769² = 37386778019130722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136723739) 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 23 ways as a sum of consecutive naturals, for example, 20669 + ... + 26469.

It is an arithmetic number, because the mean of its divisors is an integer number (7330827).

Almost surely, 2^136723769 is an apocalyptic number.

It is an amenable number.

136723769 is a deficient number, since it is larger than the sum of its proper divisors (39216079).

136723769 is a wasteful number, since it uses less digits than its factorization.

136723769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5865 (or 5858 counting only the distinct ones).

The product of its digits is 285768, while the sum is 44.

The square root of 136723769 is about 11692.8939531666. The cubic root of 136723769 is about 515.1669663169.

The spelling of 136723769 in words is "one hundred thirty-six million, seven hundred twenty-three thousand, seven hundred sixty-nine".