1164872981 has 2 divisors, whose sum is σ = 1164872982. Its totient is φ = 1164872980.

The previous prime is 1164872893. The next prime is 1164872983. The reversal of 1164872981 is 1892784611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1056900100 + 107972881 = 32510^2 + 10391^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1164872981 is a prime.

It is a super-2 number, since 2×1164872981² = 2713858123727652722, which contains 22 as substring.

Together with 1164872983, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1164872983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582436490 + 582436491.

It is an arithmetic number, because the mean of its divisors is an integer number (582436491).

Almost surely, 2^1164872981 is an apocalyptic number.

It is an amenable number.

1164872981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1164872981 is an equidigital number, since it uses as much as digits as its factorization.

1164872981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 47.

The square root of 1164872981 is about 34130.2355837167. The cubic root of 1164872981 is about 1052.1868198554.

The spelling of 1164872981 in words is "one billion, one hundred sixty-four million, eight hundred seventy-two thousand, nine hundred eighty-one".