188461457 has 2 divisors, whose sum is σ = 188461458. Its totient is φ = 188461456.

The previous prime is 188461453. The next prime is 188461463. The reversal of 188461457 is 754164881.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185395456 + 3066001 = 13616^2 + 1751^2 .

It is an emirp because it is prime and its reverse (754164881) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 188461457 - 2² = 188461453 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (188461451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94230728 + 94230729.

It is an arithmetic number, because the mean of its divisors is an integer number (94230729).

Almost surely, 2^188461457 is an apocalyptic number.

It is an amenable number.

188461457 is a deficient number, since it is larger than the sum of its proper divisors (1).

188461457 is an equidigital number, since it uses as much as digits as its factorization.

188461457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 215040, while the sum is 44.

The square root of 188461457 is about 13728.1264927156. The cubic root of 188461457 is about 573.3337592014. Note that the first 3 decimals are identical.

The spelling of 188461457 in words is "one hundred eighty-eight million, four hundred sixty-one thousand, four hundred fifty-seven".