481897189 has 2 divisors, whose sum is σ = 481897190. Its totient is φ = 481897188.

The previous prime is 481897187. The next prime is 481897193. The reversal of 481897189 is 981798184.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374422500 + 107474689 = 19350^2 + 10367^2 .

It is a cyclic number.

It is not a de Polignac number, because 481897189 - 2¹ = 481897187 is a prime.

It is a super-2 number, since 2×481897189² = 464449801532203442, which contains 22 as substring.

Together with 481897187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (481897183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 240948594 + 240948595.

It is an arithmetic number, because the mean of its divisors is an integer number (240948595).

Almost surely, 2^481897189 is an apocalyptic number.

It is an amenable number.

481897189 is a deficient number, since it is larger than the sum of its proper divisors (1).

481897189 is an equidigital number, since it uses as much as digits as its factorization.

481897189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 55.

The square root of 481897189 is about 21952.1568188641. The cubic root of 481897189 is about 784.0037337780.

The spelling of 481897189 in words is "four hundred eighty-one million, eight hundred ninety-seven thousand, one hundred eighty-nine".