1100721649 has 8 divisors (see below), whose sum is σ = 1170251712. Its totient is φ = 1032997680.

The previous prime is 1100721647. The next prime is 1100721683. The reversal of 1100721649 is 9461270011.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1100721649 - 2¹ = 1100721647 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1100721649.

It is not an unprimeable number, because it can be changed into a prime (1100721647) 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 in 7 ways as a sum of consecutive naturals, for example, 450267 + ... + 452704.

It is an arithmetic number, because the mean of its divisors is an integer number (146281464).

Almost surely, 2^1100721649 is an apocalyptic number.

It is an amenable number.

1100721649 is a deficient number, since it is larger than the sum of its proper divisors (69530063).

1100721649 is an equidigital number, since it uses as much as digits as its factorization.

1100721649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 903047.

The product of its (nonzero) digits is 3024, while the sum is 31.

The square root of 1100721649 is about 33177.1253878331. The cubic root of 1100721649 is about 1032.5058066888.

The spelling of 1100721649 in words is "one billion, one hundred million, seven hundred twenty-one thousand, six hundred forty-nine".