408871247 has 2 divisors, whose sum is σ = 408871248. Its totient is φ = 408871246.

The previous prime is 408871237. The next prime is 408871249. The reversal of 408871247 is 742178804.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 408871247 - 2⁴ = 408871231 is a prime.

Together with 408871249, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (408871249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204435623 + 204435624.

It is an arithmetic number, because the mean of its divisors is an integer number (204435624).

Almost surely, 2^408871247 is an apocalyptic number.

408871247 is a deficient number, since it is larger than the sum of its proper divisors (1).

408871247 is an equidigital number, since it uses as much as digits as its factorization.

408871247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100352, while the sum is 41.

The square root of 408871247 is about 20220.5649525427. The cubic root of 408871247 is about 742.2135128777.

The spelling of 408871247 in words is "four hundred eight million, eight hundred seventy-one thousand, two hundred forty-seven".