408423929 has 4 divisors (see below), whose sum is σ = 432448884. Its totient is φ = 384398976.

The previous prime is 408423913. The next prime is 408423931. The reversal of 408423929 is 929324804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 124434025 + 283989904 = 11155^2 + 16852^2 .

It is a cyclic number.

It is not a de Polignac number, because 408423929 - 2⁴ = 408423913 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (408423979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12012452 + ... + 12012485.

It is an arithmetic number, because the mean of its divisors is an integer number (108112221).

Almost surely, 2^408423929 is an apocalyptic number.

It is an amenable number.

408423929 is a deficient number, since it is larger than the sum of its proper divisors (24024955).

408423929 is a wasteful number, since it uses less digits than its factorization.

408423929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24024954.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 408423929 is about 20209.5009587075. The cubic root of 408423929 is about 741.9427458045.

The spelling of 408423929 in words is "four hundred eight million, four hundred twenty-three thousand, nine hundred twenty-nine".