201029813 has 4 divisors (see below), whose sum is σ = 201061740. Its totient is φ = 200997888.

The previous prime is 201029797. The next prime is 201029819. The reversal of 201029813 is 318920102.

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

It can be written as a sum of positive squares in 2 ways, for example, as 83046769 + 117983044 = 9113^2 + 10862^2 .

It is a cyclic number.

It is not a de Polignac number, because 201029813 - 2⁴ = 201029797 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 (201029819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3020 + ... + 20277.

It is an arithmetic number, because the mean of its divisors is an integer number (50265435).

Almost surely, 2^201029813 is an apocalyptic number.

It is an amenable number.

201029813 is a deficient number, since it is larger than the sum of its proper divisors (31927).

201029813 is an equidigital number, since it uses as much as digits as its factorization.

201029813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31926.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 201029813 is about 14178.4982632153. The cubic root of 201029813 is about 585.8055602890.

Adding to 201029813 its reverse (318920102), we get a palindrome (519949915).

The spelling of 201029813 in words is "two hundred one million, twenty-nine thousand, eight hundred thirteen".