1166998439 has 4 divisors (see below), whose sum is σ = 1235645424. Its totient is φ = 1098351456.

The previous prime is 1166998423. The next prime is 1166998447. The reversal of 1166998439 is 9348996611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9348996611 = 457 ⋅20457323.

It is a cyclic number.

It is not a de Polignac number, because 1166998439 - 2⁴ = 1166998423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1166998409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34323467 + ... + 34323500.

It is an arithmetic number, because the mean of its divisors is an integer number (308911356).

Almost surely, 2^1166998439 is an apocalyptic number.

1166998439 is a deficient number, since it is larger than the sum of its proper divisors (68646985).

1166998439 is an equidigital number, since it uses as much as digits as its factorization.

1166998439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68646984.

The product of its digits is 2519424, while the sum is 56.

The square root of 1166998439 is about 34161.3588576333. The cubic root of 1166998439 is about 1052.8263803117.

The spelling of 1166998439 in words is "one billion, one hundred sixty-six million, nine hundred ninety-eight thousand, four hundred thirty-nine".