1216732949 has 2 divisors, whose sum is σ = 1216732950. Its totient is φ = 1216732948.

The previous prime is 1216732921. The next prime is 1216732967. The reversal of 1216732949 is 9492376121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 829036849 + 387696100 = 28793^2 + 19690^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1216732949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1216732969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 608366474 + 608366475.

It is an arithmetic number, because the mean of its divisors is an integer number (608366475).

Almost surely, 2^1216732949 is an apocalyptic number.

It is an amenable number.

1216732949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1216732949 is an equidigital number, since it uses as much as digits as its factorization.

1216732949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 44.

The square root of 1216732949 is about 34881.6993422052. The cubic root of 1216732949 is about 1067.5750684247.

The spelling of 1216732949 in words is "one billion, two hundred sixteen million, seven hundred thirty-two thousand, nine hundred forty-nine".