201430409 has 2 divisors, whose sum is σ = 201430410. Its totient is φ = 201430408.

The previous prime is 201430403. The next prime is 201430429. The reversal of 201430409 is 904034102.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 165765625 + 35664784 = 12875^2 + 5972^2 .

It is a cyclic number.

It is not a de Polignac number, because 201430409 - 2⁴ = 201430393 is a prime.

It is not a weakly prime, because it can be changed into another prime (201430403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100715204 + 100715205.

It is an arithmetic number, because the mean of its divisors is an integer number (100715205).

Almost surely, 2^201430409 is an apocalyptic number.

It is an amenable number.

201430409 is a deficient number, since it is larger than the sum of its proper divisors (1).

201430409 is an equidigital number, since it uses as much as digits as its factorization.

201430409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 201430409 is about 14192.6181164717. The cubic root of 201430409 is about 586.1944174689.

It can be divided in two parts, 2014 and 30409, that added together give a palindrome (32423).

The spelling of 201430409 in words is "two hundred one million, four hundred thirty thousand, four hundred nine".