1172662989 has 8 divisors (see below), whose sum is σ = 1567812480. Its totient is φ = 779644416.

The previous prime is 1172662949. The next prime is 1172662999. The reversal of 1172662989 is 9892662711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1172662989 - 2¹⁹ = 1172138701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1172662949) 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 7 ways as a sum of consecutive naturals, for example, 531444 + ... + 533645.

It is an arithmetic number, because the mean of its divisors is an integer number (195976560).

Almost surely, 2^1172662989 is an apocalyptic number.

It is an amenable number.

1172662989 is a deficient number, since it is larger than the sum of its proper divisors (395149491).

1172662989 is a wasteful number, since it uses less digits than its factorization.

1172662989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1065459.

The product of its digits is 653184, while the sum is 51.

The square root of 1172662989 is about 34244.1672259671. The cubic root of 1172662989 is about 1054.5270864723.

The spelling of 1172662989 in words is "one billion, one hundred seventy-two million, six hundred sixty-two thousand, nine hundred eighty-nine".