Search a number
BaseRepresentation
bin100100101110010…
…0001010000010001
310011212121220110212
41021130201100101
510010421304014
6322134333505
742351431516
oct11134412021
93155556425
101232213009
11582608965
122a47ba295
13168392831
14b991730d
15732a023e
hex49721411

1232213009 has 2 divisors, whose sum is σ = 1232213010. Its totient is φ = 1232213008.

The previous prime is 1232212981. The next prime is 1232213027. The reversal of 1232213009 is 9003122321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 674544784 + 557668225 = 25972^2 + 23615^2 .

It is an emirp because it is prime and its reverse (9003122321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1232213009 - 28 = 1232212753 is a prime.

It is not a weakly prime, because it can be changed into another prime (1232213039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616106504 + 616106505.

It is an arithmetic number, because the mean of its divisors is an integer number (616106505).

Almost surely, 21232213009 is an apocalyptic number.

It is an amenable number.

1232213009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232213009 is an equidigital number, since it uses as much as digits as its factorization.

1232213009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1232213009 is about 35102.8917469772. The cubic root of 1232213009 is about 1072.0834617135.

The spelling of 1232213009 in words is "one billion, two hundred thirty-two million, two hundred thirteen thousand, nine".