200421029 has 4 divisors (see below), whose sum is σ = 201296460. Its totient is φ = 199545600.

The previous prime is 200421017. The next prime is 200421047. The reversal of 200421029 is 920124002.

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 111872929 + 88548100 = 10577^2 + 9410^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-200421029 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 200421029.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200421229) 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, 437372 + ... + 437829.

It is an arithmetic number, because the mean of its divisors is an integer number (50324115).

Almost surely, 2^200421029 is an apocalyptic number.

It is an amenable number.

200421029 is a deficient number, since it is larger than the sum of its proper divisors (875431).

200421029 is an equidigital number, since it uses as much as digits as its factorization.

200421029 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 875430.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 200421029 is about 14157.0134209162. The cubic root of 200421029 is about 585.2136254407.

The spelling of 200421029 in words is "two hundred million, four hundred twenty-one thousand, twenty-nine".