192391 has 2 divisors, whose sum is σ = 192392. Its totient is φ = 192390.

The previous prime is 192383. The next prime is 192407. The reversal of 192391 is 193291.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 192391 - 2³ = 192383 is a prime.

It is a d-powerful number, because it can be written as 1 + 9² + 3⁷ + 2¹⁷ + 9⁵ + 1 .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (192341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96195 + 96196.

It is an arithmetic number, because the mean of its divisors is an integer number (96196).

2¹⁹²³⁹¹ is an apocalyptic number.

192391 is a deficient number, since it is larger than the sum of its proper divisors (1).

192391 is an equidigital number, since it uses as much as digits as its factorization.

192391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 25.

The square root of 192391 is about 438.6239847523. The cubic root of 192391 is about 57.7291173411.

Subtracting 192391 from its reverse (193291), we obtain a square (900 = 30²).

The spelling of 192391 in words is "one hundred ninety-two thousand, three hundred ninety-one".