1198695543 has 4 divisors (see below), whose sum is σ = 1598260728. Its totient is φ = 799130360.

The previous prime is 1198695529. The next prime is 1198695607. The reversal of 1198695543 is 3455968911.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3455968911 = 3 ⋅1151989637.

It is a cyclic number.

It is not a de Polignac number, because 1198695543 - 2⁴ = 1198695527 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1198690543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199782588 + ... + 199782593.

It is an arithmetic number, because the mean of its divisors is an integer number (399565182).

Almost surely, 2^1198695543 is an apocalyptic number.

1198695543 is a deficient number, since it is larger than the sum of its proper divisors (399565185).

1198695543 is an equidigital number, since it uses as much as digits as its factorization.

1198695543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399565184.

The product of its digits is 1166400, while the sum is 51.

The square root of 1198695543 is about 34622.1828168011. The cubic root of 1198695543 is about 1062.2733761275.

The spelling of 1198695543 in words is "one billion, one hundred ninety-eight million, six hundred ninety-five thousand, five hundred forty-three".