662909129 has 2 divisors, whose sum is σ = 662909130. Its totient is φ = 662909128.

The previous prime is 662909099. The next prime is 662909167. The reversal of 662909129 is 921909266.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 482812729 + 180096400 = 21973^2 + 13420^2 .

It is a cyclic number.

It is not a de Polignac number, because 662909129 - 2¹⁶ = 662843593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 662909129.

It is not a weakly prime, because it can be changed into another prime (662909029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331454564 + 331454565.

It is an arithmetic number, because the mean of its divisors is an integer number (331454565).

Almost surely, 2^662909129 is an apocalyptic number.

It is an amenable number.

662909129 is a deficient number, since it is larger than the sum of its proper divisors (1).

662909129 is an equidigital number, since it uses as much as digits as its factorization.

662909129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 662909129 is about 25747.0217500976. The cubic root of 662909129 is about 871.9361157537.

The spelling of 662909129 in words is "six hundred sixty-two million, nine hundred nine thousand, one hundred twenty-nine".