185381897 has 2 divisors, whose sum is σ = 185381898. Its totient is φ = 185381896.

The previous prime is 185381873. The next prime is 185381921. The reversal of 185381897 is 798183581.

It is a balanced prime because it is at equal distance from previous prime (185381873) and next prime (185381921).

It can be written as a sum of positive squares in only one way, i.e., 124791241 + 60590656 = 11171^2 + 7784^2 .

It is a cyclic number.

It is not a de Polignac number, because 185381897 - 2¹⁰ = 185380873 is a prime.

It is not a weakly prime, because it can be changed into another prime (185381827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 92690948 + 92690949.

It is an arithmetic number, because the mean of its divisors is an integer number (92690949).

Almost surely, 2^185381897 is an apocalyptic number.

It is an amenable number.

185381897 is a deficient number, since it is larger than the sum of its proper divisors (1).

185381897 is an equidigital number, since it uses as much as digits as its factorization.

185381897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 483840, while the sum is 50.

The square root of 185381897 is about 13615.5020840217. The cubic root of 185381897 is about 570.1937342888.

The spelling of 185381897 in words is "one hundred eighty-five million, three hundred eighty-one thousand, eight hundred ninety-seven".