1171980500 has 36 divisors (see below), whose sum is σ = 2561278356. Its totient is φ = 468486000.

The previous prime is 1171980497. The next prime is 1171980503. The reversal of 1171980500 is 50891711.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is an interprime number because it is at equal distance from previous prime (1171980497) and next prime (1171980503).

It can be written as a sum of positive squares in 2 ways, for example, as 37503376 + 1134477124 = 6124^2 + 33682^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171980503) 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 in 11 ways as a sum of consecutive naturals, for example, 764735 + ... + 766265.

It is an arithmetic number, because the mean of its divisors is an integer number (71146621).

Almost surely, 2^1171980500 is an apocalyptic number.

1171980500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1171980500 is an abundant number, since it is smaller than the sum of its proper divisors (1389297856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1171980500 is an frugal number, since it uses more digits than its factorization.

1171980500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3081 (or 1538 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 32.

The square root of 1171980500 is about 34234.2007355218. The cubic root of 1171980500 is about 1054.3224687742.

The spelling of 1171980500 in words is "one billion, one hundred seventy-one million, nine hundred eighty thousand, five hundred".