1898466181 has 2 divisors, whose sum is σ = 1898466182. Its totient is φ = 1898466180.

The previous prime is 1898466107. The next prime is 1898466277. The reversal of 1898466181 is 1816648981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1855024900 + 43441281 = 43070^2 + 6591^2 .

It is a cyclic number.

It is not a de Polignac number, because 1898466181 - 2¹³ = 1898457989 is a prime.

It is a super-2 number, since 2×1898466181² = 7208347680801449522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1898466481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 949233090 + 949233091.

It is an arithmetic number, because the mean of its divisors is an integer number (949233091).

Almost surely, 2^1898466181 is an apocalyptic number.

It is an amenable number.

1898466181 is a deficient number, since it is larger than the sum of its proper divisors (1).

1898466181 is an equidigital number, since it uses as much as digits as its factorization.

1898466181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 663552, while the sum is 52.

The square root of 1898466181 is about 43571.3917725840. The cubic root of 1898466181 is about 1238.2289538646.

The spelling of 1898466181 in words is "one billion, eight hundred ninety-eight million, four hundred sixty-six thousand, one hundred eighty-one".