136967399 has 4 divisors (see below), whose sum is σ = 137732760. Its totient is φ = 136202040.

The previous prime is 136967381. The next prime is 136967407. The reversal of 136967399 is 993769631.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 136967399 - 2²⁰ = 135918823 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 136967399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136967339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 382412 + ... + 382769.

It is an arithmetic number, because the mean of its divisors is an integer number (34433190).

Almost surely, 2^136967399 is an apocalyptic number.

136967399 is a deficient number, since it is larger than the sum of its proper divisors (765361).

136967399 is an equidigital number, since it uses as much as digits as its factorization.

136967399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765360.

The product of its digits is 1653372, while the sum is 53.

The square root of 136967399 is about 11703.3071821601. The cubic root of 136967399 is about 515.4727791570.

The spelling of 136967399 in words is "one hundred thirty-six million, nine hundred sixty-seven thousand, three hundred ninety-nine".