1171988949 has 8 divisors (see below), whose sum is σ = 1604885920. Its totient is φ = 760208976.

The previous prime is 1171988941. The next prime is 1171988957. The reversal of 1171988949 is 9498891711.

It is an interprime number because it is at equal distance from previous prime (1171988941) and next prime (1171988957).

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

It is not a de Polignac number, because 1171988949 - 2³ = 1171988941 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1171988941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5279119 + ... + 5279340.

It is an arithmetic number, because the mean of its divisors is an integer number (200610740).

Almost surely, 2^1171988949 is an apocalyptic number.

It is an amenable number.

1171988949 is a deficient number, since it is larger than the sum of its proper divisors (432896971).

1171988949 is a wasteful number, since it uses less digits than its factorization.

1171988949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10558499.

The product of its digits is 1306368, while the sum is 57.

The square root of 1171988949 is about 34234.3241352885. The cubic root of 1171988949 is about 1054.3250023628.

The spelling of 1171988949 in words is "one billion, one hundred seventy-one million, nine hundred eighty-eight thousand, nine hundred forty-nine".