408271649 has 2 divisors, whose sum is σ = 408271650. Its totient is φ = 408271648.

The previous prime is 408271631. The next prime is 408271651. The reversal of 408271649 is 946172804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352500625 + 55771024 = 18775^2 + 7468^2 .

It is a cyclic number.

It is not a de Polignac number, because 408271649 - 2⁸ = 408271393 is a prime.

Together with 408271651, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (408271679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204135824 + 204135825.

It is an arithmetic number, because the mean of its divisors is an integer number (204135825).

Almost surely, 2^408271649 is an apocalyptic number.

It is an amenable number.

408271649 is a deficient number, since it is larger than the sum of its proper divisors (1).

408271649 is an equidigital number, since it uses as much as digits as its factorization.

408271649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 408271649 is about 20205.7330725713. The cubic root of 408271649 is about 741.8505237462.

The spelling of 408271649 in words is "four hundred eight million, two hundred seventy-one thousand, six hundred forty-nine".