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1204850989 is a prime number
BaseRepresentation
bin100011111010000…
…1001000100101101
310002222010202211201
41013310021010231
54431420212424
6315320045501
741600031046
oct10764110455
93088122751
101204850989
1156911a421
12297603891
131628024a4
14b60338cd
1570b97d44
hex47d0912d

1204850989 has 2 divisors, whose sum is σ = 1204850990. Its totient is φ = 1204850988.

The previous prime is 1204850987. The next prime is 1204851007. The reversal of 1204850989 is 9890584021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1145822500 + 59028489 = 33850^2 + 7683^2 .

It is an emirp because it is prime and its reverse (9890584021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1204850989 - 21 = 1204850987 is a prime.

Together with 1204850987, 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 (1204850987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602425494 + 602425495.

It is an arithmetic number, because the mean of its divisors is an integer number (602425495).

Almost surely, 21204850989 is an apocalyptic number.

It is an amenable number.

1204850989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1204850989 is an equidigital number, since it uses as much as digits as its factorization.

1204850989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 207360, while the sum is 46.

The square root of 1204850989 is about 34710.9635273929. The cubic root of 1204850989 is about 1064.0885731591.

The spelling of 1204850989 in words is "one billion, two hundred four million, eight hundred fifty thousand, nine hundred eighty-nine".