204644084987 has 2 divisors, whose sum is σ = 204644084988. Its totient is φ = 204644084986.

The previous prime is 204644084969. The next prime is 204644085013. The reversal of 204644084987 is 789480446402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204644084987 is a prime.

It is a super-3 number, since 3×204644084987³ (a number of 35 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (204644084587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102322042493 + 102322042494.

It is an arithmetic number, because the mean of its divisors is an integer number (102322042494).

Almost surely, 2^204644084987 is an apocalyptic number.

204644084987 is a deficient number, since it is larger than the sum of its proper divisors (1).

204644084987 is an equidigital number, since it uses as much as digits as its factorization.

204644084987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12386304, while the sum is 56.

The spelling of 204644084987 in words is "two hundred four billion, six hundred forty-four million, eighty-four thousand, nine hundred eighty-seven".