1116731621 has 2 divisors, whose sum is σ = 1116731622. Its totient is φ = 1116731620.

The previous prime is 1116731617. The next prime is 1116731723. The reversal of 1116731621 is 1261376111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 647142721 + 469588900 = 25439^2 + 21670^2 .

It is a cyclic number.

It is not a de Polignac number, because 1116731621 - 2² = 1116731617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1116730621) 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, 558365810 + 558365811.

It is an arithmetic number, because the mean of its divisors is an integer number (558365811).

Almost surely, 2^1116731621 is an apocalyptic number.

It is an amenable number.

1116731621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1116731621 is an equidigital number, since it uses as much as digits as its factorization.

1116731621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 29.

The square root of 1116731621 is about 33417.5346337817. The cubic root of 1116731621 is about 1037.4876552651.

The spelling of 1116731621 in words is "one billion, one hundred sixteen million, seven hundred thirty-one thousand, six hundred twenty-one".