1172721983 has 2 divisors, whose sum is σ = 1172721984. Its totient is φ = 1172721982.

The previous prime is 1172721973. The next prime is 1172722037. The reversal of 1172721983 is 3891272711.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (3891272711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1172721983 - 2²⁸ = 904286527 is a prime.

It is a super-2 number, since 2×1172721983² = 2750553698822904578, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1172721983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1172721973) 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 as a sum of consecutive naturals, namely, 586360991 + 586360992.

It is an arithmetic number, because the mean of its divisors is an integer number (586360992).

Almost surely, 2^1172721983 is an apocalyptic number.

1172721983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1172721983 is an equidigital number, since it uses as much as digits as its factorization.

1172721983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 41.

The square root of 1172721983 is about 34245.0285881031. The cubic root of 1172721983 is about 1054.5447697931.

The spelling of 1172721983 in words is "one billion, one hundred seventy-two million, seven hundred twenty-one thousand, nine hundred eighty-three".