398719 has 4 divisors (see below), whose sum is σ = 406296. Its totient is φ = 391144.

The previous prime is 398711. The next prime is 398729. The reversal of 398719 is 917893.

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 398719 - 2³ = 398711 is a prime.

It is a super-2 number, since 2×398719² = 317953681922, which contains 22 as substring.

It is a Duffinian number.

398719 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398711) 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, 3709 + ... + 3814.

It is an arithmetic number, because the mean of its divisors is an integer number (101574).

2³⁹⁸⁷¹⁹ is an apocalyptic number.

398719 is a deficient number, since it is larger than the sum of its proper divisors (7577).

398719 is an equidigital number, since it uses as much as digits as its factorization.

398719 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7576.

The product of its digits is 13608, while the sum is 37.

The square root of 398719 is about 631.4420005036. The cubic root of 398719 is about 73.6018917874.

The spelling of 398719 in words is "three hundred ninety-eight thousand, seven hundred nineteen".