409252899 has 16 divisors (see below), whose sum is σ = 596277504. Its totient is φ = 247615200.

The previous prime is 409252897. The next prime is 409252903. The reversal of 409252899 is 998252904.

It is a happy number.

It is a Cunningham number, because it is equal to 20230²-1.

It is not a de Polignac number, because 409252899 - 2¹ = 409252897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (409252897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10114 + ... + 30344.

It is an arithmetic number, because the mean of its divisors is an integer number (37267344).

Almost surely, 2^409252899 is an apocalyptic number.

409252899 is a deficient number, since it is larger than the sum of its proper divisors (187024605).

409252899 is a wasteful number, since it uses less digits than its factorization.

409252899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20858.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 409252899 is about 20229.9999752842. Note that the first 4 decimals coincide. The cubic root of 409252899 is about 742.4443754314. Note that the first 3 decimals are identical.

The spelling of 409252899 in words is "four hundred nine million, two hundred fifty-two thousand, eight hundred ninety-nine".