204401302409 has 2 divisors, whose sum is σ = 204401302410. Its totient is φ = 204401302408.

The previous prime is 204401302397. The next prime is 204401302429. The reversal of 204401302409 is 904203104402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185246742409 + 19154560000 = 430403^2 + 138400^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204401302409 is a prime.

It is not a weakly prime, because it can be changed into another prime (204401302429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102200651204 + 102200651205.

It is an arithmetic number, because the mean of its divisors is an integer number (102200651205).

Almost surely, 2^204401302409 is an apocalyptic number.

It is an amenable number.

204401302409 is a deficient number, since it is larger than the sum of its proper divisors (1).

204401302409 is an equidigital number, since it uses as much as digits as its factorization.

204401302409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 204401302409 in words is "two hundred four billion, four hundred one million, three hundred two thousand, four hundred nine".