406969729 has 2 divisors, whose sum is σ = 406969730. Its totient is φ = 406969728.

The previous prime is 406969727. The next prime is 406969733. The reversal of 406969729 is 927969604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 293334129 + 113635600 = 17127^2 + 10660^2 .

It is a cyclic number.

It is not a de Polignac number, because 406969729 - 2¹ = 406969727 is a prime.

Together with 406969727, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (406969727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203484864 + 203484865.

It is an arithmetic number, because the mean of its divisors is an integer number (203484865).

Almost surely, 2^406969729 is an apocalyptic number.

It is an amenable number.

406969729 is a deficient number, since it is larger than the sum of its proper divisors (1).

406969729 is an equidigital number, since it uses as much as digits as its factorization.

406969729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The square root of 406969729 is about 20173.4907490003. The cubic root of 406969729 is about 741.0611322629.

The spelling of 406969729 in words is "four hundred six million, nine hundred sixty-nine thousand, seven hundred twenty-nine".