429661 has 2 divisors, whose sum is σ = 429662. Its totient is φ = 429660.

The previous prime is 429659. The next prime is 429673. The reversal of 429661 is 166924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396900 + 32761 = 630^2 + 181^2 .

It is a cyclic number.

It is not a de Polignac number, because 429661 - 2¹ = 429659 is a prime.

Together with 429659, it forms a pair of twin primes.

429661 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (429631) 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, 214830 + 214831.

It is an arithmetic number, because the mean of its divisors is an integer number (214831).

2⁴²⁹⁶⁶¹ is an apocalyptic number.

It is an amenable number.

429661 is a deficient number, since it is larger than the sum of its proper divisors (1).

429661 is an equidigital number, since it uses as much as digits as its factorization.

429661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 28.

The square root of 429661 is about 655.4853163878. The cubic root of 429661 is about 75.4585829007.

The spelling of 429661 in words is "four hundred twenty-nine thousand, six hundred sixty-one".