136787399 has 16 divisors (see below), whose sum is σ = 158825472. Its totient is φ = 115388928.

The previous prime is 136787383. The next prime is 136787411. The reversal of 136787399 is 993787631.

It is a happy number.

136787399 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 136787399 - 2⁴ = 136787383 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136787399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136787359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138662 + ... + 139644.

It is an arithmetic number, because the mean of its divisors is an integer number (9926592).

Almost surely, 2^136787399 is an apocalyptic number.

136787399 is a deficient number, since it is larger than the sum of its proper divisors (22038073).

136787399 is a wasteful number, since it uses less digits than its factorization.

136787399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286.

The product of its digits is 1714608, while the sum is 53.

The square root of 136787399 is about 11695.6145199814. The cubic root of 136787399 is about 515.2468719311.

The spelling of 136787399 in words is "one hundred thirty-six million, seven hundred eighty-seven thousand, three hundred ninety-nine".