398967 has 4 divisors (see below), whose sum is σ = 531960. Its totient is φ = 265976.

The previous prime is 398941. The next prime is 398969. The reversal of 398967 is 769893.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 398967 - 2⁶ = 398903 is a prime.

It is a D-number.

398967 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66492 + ... + 66497.

It is an arithmetic number, because the mean of its divisors is an integer number (132990).

2³⁹⁸⁹⁶⁷ is an apocalyptic number.

398967 is a deficient number, since it is larger than the sum of its proper divisors (132993).

398967 is a wasteful number, since it uses less digits than its factorization.

398967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132992.

The product of its digits is 81648, while the sum is 42.

The square root of 398967 is about 631.6383458911. The cubic root of 398967 is about 73.6171485522.

It can be divided in two parts, 39896 and 7, that added together give a triangular number (39903 = T₂₈₂).

The spelling of 398967 in words is "three hundred ninety-eight thousand, nine hundred sixty-seven".