204629304991 has 2 divisors, whose sum is σ = 204629304992. Its totient is φ = 204629304990.

The previous prime is 204629304989. The next prime is 204629305003. The reversal of 204629304991 is 199403926402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 204629304991 - 2¹ = 204629304989 is a prime.

It is a super-2 number, since 2×204629304991² (a number of 23 digits) contains 22 as substring.

Together with 204629304989, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (204629304931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102314652495 + 102314652496.

It is an arithmetic number, because the mean of its divisors is an integer number (102314652496).

Almost surely, 2^204629304991 is an apocalyptic number.

204629304991 is a deficient number, since it is larger than the sum of its proper divisors (1).

204629304991 is an equidigital number, since it uses as much as digits as its factorization.

204629304991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 839808, while the sum is 49.

The spelling of 204629304991 in words is "two hundred four billion, six hundred twenty-nine million, three hundred four thousand, nine hundred ninety-one".