189797 has 2 divisors, whose sum is σ = 189798. Its totient is φ = 189796.

The previous prime is 189767. The next prime is 189799. The reversal of 189797 is 797981.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 106276 + 83521 = 326^2 + 289^2 .

It is a cyclic number.

It is not a de Polignac number, because 189797 - 2⁶ = 189733 is a prime.

Together with 189799, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94898 + 94899.

It is an arithmetic number, because the mean of its divisors is an integer number (94899).

2¹⁸⁹⁷⁹⁷ is an apocalyptic number.

It is an amenable number.

189797 is a deficient number, since it is larger than the sum of its proper divisors (1).

189797 is an equidigital number, since it uses as much as digits as its factorization.

189797 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31752, while the sum is 41.

The square root of 189797 is about 435.6569751536. The cubic root of 189797 is about 57.4684893512.

It can be divided in two parts, 1 and 89797, that added together give a palindrome (89798).

The spelling of 189797 in words is "one hundred eighty-nine thousand, seven hundred ninety-seven".