408427 has 2 divisors, whose sum is σ = 408428. Its totient is φ = 408426.

The previous prime is 408413. The next prime is 408431. The reversal of 408427 is 724804.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-408427 is a prime.

It is a super-2 number, since 2×408427² = 333625228658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (408437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204213 + 204214.

It is an arithmetic number, because the mean of its divisors is an integer number (204214).

2⁴⁰⁸⁴²⁷ is an apocalyptic number.

408427 is a deficient number, since it is larger than the sum of its proper divisors (1).

408427 is an equidigital number, since it uses as much as digits as its factorization.

408427 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 408427 is about 639.0829367148. The cubic root of 408427 is about 74.1944605392.

The spelling of 408427 in words is "four hundred eight thousand, four hundred twenty-seven".