409693 has 2 divisors, whose sum is σ = 409694. Its totient is φ = 409692.

The previous prime is 409691. The next prime is 409709. The reversal of 409693 is 396904.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213444 + 196249 = 462^2 + 443^2 .

It is a cyclic number.

It is not a de Polignac number, because 409693 - 2¹ = 409691 is a prime.

Together with 409691, 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 (409691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204846 + 204847.

It is an arithmetic number, because the mean of its divisors is an integer number (204847).

2⁴⁰⁹⁶⁹³ is an apocalyptic number.

It is an amenable number.

409693 is a deficient number, since it is larger than the sum of its proper divisors (1).

409693 is an equidigital number, since it uses as much as digits as its factorization.

409693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 409693 is about 640.0726521263. The cubic root of 409693 is about 74.2710415864.

The spelling of 409693 in words is "four hundred nine thousand, six hundred ninety-three".