239797 has 4 divisors (see below), whose sum is σ = 246316. Its totient is φ = 233280.

The previous prime is 239783. The next prime is 239803. The reversal of 239797 is 797932.

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

It can be written as a sum of positive squares in 2 ways, for example, as 221841 + 17956 = 471^2 + 134^2 .

It is a cyclic number.

It is not a de Polignac number, because 239797 - 2¹¹ = 237749 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 6481 = 239797 / (2 + 3 + 9 + 7 + 9 + 7).

It is a d-powerful number, because it can be written as 2⁷ + 3¹¹ + 7³ + 9³ + 9⁵ + 7⁴ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (239737) 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, 3204 + ... + 3277.

It is an arithmetic number, because the mean of its divisors is an integer number (61579).

2²³⁹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

239797 is a deficient number, since it is larger than the sum of its proper divisors (6519).

239797 is an equidigital number, since it uses as much as digits as its factorization.

239797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6518.

The product of its digits is 23814, while the sum is 37.

The square root of 239797 is about 489.6907187195. The cubic root of 239797 is about 62.1271238379.

The spelling of 239797 in words is "two hundred thirty-nine thousand, seven hundred ninety-seven".