398407 has 2 divisors, whose sum is σ = 398408. Its totient is φ = 398406.

The previous prime is 398393. The next prime is 398417. The reversal of 398407 is 704893.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 398407 - 2¹⁵ = 365639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (398417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199203 + 199204.

It is an arithmetic number, because the mean of its divisors is an integer number (199204).

2³⁹⁸⁴⁰⁷ is an apocalyptic number.

398407 is a deficient number, since it is larger than the sum of its proper divisors (1).

398407 is an equidigital number, since it uses as much as digits as its factorization.

398407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 398407 is about 631.1948985852. The cubic root of 398407 is about 73.5826888043.

The spelling of 398407 in words is "three hundred ninety-eight thousand, four hundred seven".