543781969 has 2 divisors, whose sum is σ = 543781970. Its totient is φ = 543781968.

The previous prime is 543781951. The next prime is 543781993. The reversal of 543781969 is 969187345.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 541260225 + 2521744 = 23265^2 + 1588^2 .

It is a cyclic number.

It is not a de Polignac number, because 543781969 - 2⁷ = 543781841 is a prime.

It is a super-2 number, since 2×543781969² = 591397659619033922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (543781949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271890984 + 271890985.

It is an arithmetic number, because the mean of its divisors is an integer number (271890985).

Almost surely, 2^543781969 is an apocalyptic number.

It is an amenable number.

543781969 is a deficient number, since it is larger than the sum of its proper divisors (1).

543781969 is an equidigital number, since it uses as much as digits as its factorization.

543781969 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1632960, while the sum is 52.

The square root of 543781969 is about 23319.1331099593. The cubic root of 543781969 is about 816.2219460867.

The spelling of 543781969 in words is "five hundred forty-three million, seven hundred eighty-one thousand, nine hundred sixty-nine".