408267997 has 4 divisors (see below), whose sum is σ = 408308796. Its totient is φ = 408227200.

The previous prime is 408267989. The next prime is 408268013. The reversal of 408267997 is 799762804.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 183087961 + 225180036 = 13531^2 + 15006^2 .

It is a cyclic number.

It is not a de Polignac number, because 408267997 - 2³ = 408267989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (408267967) 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, 5997 + ... + 29197.

It is an arithmetic number, because the mean of its divisors is an integer number (102077199).

Almost surely, 2^408267997 is an apocalyptic number.

It is an amenable number.

408267997 is a deficient number, since it is larger than the sum of its proper divisors (40799).

408267997 is a wasteful number, since it uses less digits than its factorization.

408267997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40798.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 408267997 is about 20205.6427019781. The cubic root of 408267997 is about 741.8483117826.

The spelling of 408267997 in words is "four hundred eight million, two hundred sixty-seven thousand, nine hundred ninety-seven".