188261 has 2 divisors, whose sum is σ = 188262. Its totient is φ = 188260.

The previous prime is 188249. The next prime is 188273. The reversal of 188261 is 162881.

It is a balanced prime because it is at equal distance from previous prime (188249) and next prime (188273).

It can be written as a sum of positive squares in only one way, i.e., 185761 + 2500 = 431^2 + 50^2 .

It is an emirp because it is prime and its reverse (162881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 188261 - 2⁶ = 188197 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 188261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94130 + 94131.

It is an arithmetic number, because the mean of its divisors is an integer number (94131).

2¹⁸⁸²⁶¹ is an apocalyptic number.

It is an amenable number.

188261 is a deficient number, since it is larger than the sum of its proper divisors (1).

188261 is an equidigital number, since it uses as much as digits as its factorization.

188261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 26.

The square root of 188261 is about 433.8905391916. The cubic root of 188261 is about 57.3130411632.

The spelling of 188261 in words is "one hundred eighty-eight thousand, two hundred sixty-one".