136720203 has 4 divisors (see below), whose sum is σ = 182293608. Its totient is φ = 91146800.

The previous prime is 136720201. The next prime is 136720223. The reversal of 136720203 is 302027631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302027631 = 3 ⋅100675877.

It is a cyclic number.

It is not a de Polignac number, because 136720203 - 2¹ = 136720201 is a prime.

It is a super-3 number, since 3×136720203³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (136720201) 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 3 ways as a sum of consecutive naturals, for example, 22786698 + ... + 22786703.

It is an arithmetic number, because the mean of its divisors is an integer number (45573402).

Almost surely, 2^136720203 is an apocalyptic number.

136720203 is a deficient number, since it is larger than the sum of its proper divisors (45573405).

136720203 is an equidigital number, since it uses as much as digits as its factorization.

136720203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45573404.

The product of its (nonzero) digits is 1512, while the sum is 24.

The square root of 136720203 is about 11692.7414663970. The cubic root of 136720203 is about 515.1624874532.

Adding to 136720203 its reverse (302027631), we get a palindrome (438747834).

The spelling of 136720203 in words is "one hundred thirty-six million, seven hundred twenty thousand, two hundred three".