408492481 has 2 divisors, whose sum is σ = 408492482. Its totient is φ = 408492480.

The previous prime is 408492479. The next prime is 408492503. The reversal of 408492481 is 184294804.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 242082481 + 166410000 = 15559^2 + 12900^2 .

It is a cyclic number.

It is not a de Polignac number, because 408492481 - 2¹ = 408492479 is a prime.

It is a super-2 number, since 2×408492481² = 333732214067070722, which contains 22 as substring.

Together with 408492479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (408492421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204246240 + 204246241.

It is an arithmetic number, because the mean of its divisors is an integer number (204246241).

Almost surely, 2^408492481 is an apocalyptic number.

It is an amenable number.

408492481 is a deficient number, since it is larger than the sum of its proper divisors (1).

408492481 is an equidigital number, since it uses as much as digits as its factorization.

408492481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 408492481 is about 20211.1969215086. The cubic root of 408492481 is about 741.9842539941.

The spelling of 408492481 in words is "four hundred eight million, four hundred ninety-two thousand, four hundred eighty-one".