197481569 has 2 divisors, whose sum is σ = 197481570. Its totient is φ = 197481568.

The previous prime is 197481547. The next prime is 197481607. The reversal of 197481569 is 965184791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 158256400 + 39225169 = 12580^2 + 6263^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197481569 is a prime.

It is a super-2 number, since 2×197481569² = 77997940189403522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (197481539) 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, 98740784 + 98740785.

It is an arithmetic number, because the mean of its divisors is an integer number (98740785).

Almost surely, 2^197481569 is an apocalyptic number.

It is an amenable number.

197481569 is a deficient number, since it is larger than the sum of its proper divisors (1).

197481569 is an equidigital number, since it uses as much as digits as its factorization.

197481569 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 50.

The square root of 197481569 is about 14052.8135617036. The cubic root of 197481569 is about 582.3385262235.

The spelling of 197481569 in words is "one hundred ninety-seven million, four hundred eighty-one thousand, five hundred sixty-nine".