1172955983 has 4 divisors (see below), whose sum is σ = 1174689240. Its totient is φ = 1171222728.

The previous prime is 1172955977. The next prime is 1172956027. The reversal of 1172955983 is 3895592711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1172955983 - 2¹² = 1172951887 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 (1172955383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 865613 + ... + 866966.

It is an arithmetic number, because the mean of its divisors is an integer number (293672310).

Almost surely, 2^1172955983 is an apocalyptic number.

1172955983 is a deficient number, since it is larger than the sum of its proper divisors (1733257).

1172955983 is an equidigital number, since it uses as much as digits as its factorization.

1172955983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1733256.

The product of its digits is 680400, while the sum is 50.

The square root of 1172955983 is about 34248.4449719984. Note that the first 3 decimals coincide. The cubic root of 1172955983 is about 1054.6149049342.

The spelling of 1172955983 in words is "one billion, one hundred seventy-two million, nine hundred fifty-five thousand, nine hundred eighty-three".