190732121 has 2 divisors, whose sum is σ = 190732122. Its totient is φ = 190732120.

The previous prime is 190732111. The next prime is 190732153. The reversal of 190732121 is 121237091.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133518025 + 57214096 = 11555^2 + 7564^2 .

It is a cyclic number.

It is not a de Polignac number, because 190732121 - 2¹⁰ = 190731097 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (190732111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95366060 + 95366061.

It is an arithmetic number, because the mean of its divisors is an integer number (95366061).

Almost surely, 2^190732121 is an apocalyptic number.

It is an amenable number.

190732121 is a deficient number, since it is larger than the sum of its proper divisors (1).

190732121 is an equidigital number, since it uses as much as digits as its factorization.

190732121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 190732121 is about 13810.5800385067. The cubic root of 190732121 is about 575.6271629522.

The spelling of 190732121 in words is "one hundred ninety million, seven hundred thirty-two thousand, one hundred twenty-one".