398797 has 8 divisors (see below), whose sum is σ = 475776. Its totient is φ = 326832.

The previous prime is 398771. The next prime is 398813. The reversal of 398797 is 797893.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 398797 - 2⁷ = 398669 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393797) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1078 + ... + 1399.

It is an arithmetic number, because the mean of its divisors is an integer number (59472).

2³⁹⁸⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

398797 is a deficient number, since it is larger than the sum of its proper divisors (76979).

398797 is a wasteful number, since it uses less digits than its factorization.

398797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507.

The product of its digits is 95256, while the sum is 43.

The square root of 398797 is about 631.5037608756. The cubic root of 398797 is about 73.6066909678.

It can be divided in two parts, 398 and 797, that multiplied together give a triangular number (317206 = T₇₉₆).

The spelling of 398797 in words is "three hundred ninety-eight thousand, seven hundred ninety-seven".