398677 has 4 divisors (see below), whose sum is σ = 419680. Its totient is φ = 377676.

The previous prime is 398669. The next prime is 398681. The reversal of 398677 is 776893.

398677 is nontrivially palindromic in base 15.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 398677 - 2³ = 398669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 398677.

It is not an unprimeable number, because it can be changed into a prime (398627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10473 + ... + 10510.

It is an arithmetic number, because the mean of its divisors is an integer number (104920).

2³⁹⁸⁶⁷⁷ is an apocalyptic number.

It is an amenable number.

398677 is a deficient number, since it is larger than the sum of its proper divisors (21003).

398677 is a wasteful number, since it uses less digits than its factorization.

398677 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21002.

The product of its digits is 63504, while the sum is 40.

The square root of 398677 is about 631.4087424165. The cubic root of 398677 is about 73.5993073541.

The spelling of 398677 in words is "three hundred ninety-eight thousand, six hundred seventy-seven".