136001999 has 6 divisors (see below), whose sum is σ = 158206464. Its totient is φ = 116573100.

The previous prime is 136001977. The next prime is 136002007. The reversal of 136001999 is 999100631.

It is not a de Polignac number, because 136001999 - 2²⁴ = 119224783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136001939) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1387727 + ... + 1387824.

It is an arithmetic number, because the mean of its divisors is an integer number (26367744).

Almost surely, 2^136001999 is an apocalyptic number.

136001999 is a deficient number, since it is larger than the sum of its proper divisors (22204465).

136001999 is an equidigital number, since it uses as much as digits as its factorization.

136001999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2775565 (or 2775558 counting only the distinct ones).

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 136001999 is about 11661.9894957936. The cubic root of 136001999 is about 514.2588377232.

The spelling of 136001999 in words is "one hundred thirty-six million, one thousand, nine hundred ninety-nine".