188736461 has 2 divisors, whose sum is σ = 188736462. Its totient is φ = 188736460.

The previous prime is 188736433. The next prime is 188736467. The reversal of 188736461 is 164637881.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 163686436 + 25050025 = 12794^2 + 5005^2 .

It is an emirp because it is prime and its reverse (164637881) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-188736461 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (188736467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94368230 + 94368231.

It is an arithmetic number, because the mean of its divisors is an integer number (94368231).

Almost surely, 2^188736461 is an apocalyptic number.

It is an amenable number.

188736461 is a deficient number, since it is larger than the sum of its proper divisors (1).

188736461 is an equidigital number, since it uses as much as digits as its factorization.

188736461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 44.

The square root of 188736461 is about 13738.1389205380. The cubic root of 188736461 is about 573.6124942651.

The spelling of 188736461 in words is "one hundred eighty-eight million, seven hundred thirty-six thousand, four hundred sixty-one".