1121619849 has 12 divisors (see below), whose sum is σ = 1739655504. Its totient is φ = 640925544.

The previous prime is 1121619809. The next prime is 1121619881. The reversal of 1121619849 is 9489161211.

It is not a de Polignac number, because 1121619849 - 2⁷ = 1121619721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121619849.

It is not an unprimeable number, because it can be changed into a prime (1121619809) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3814887 + ... + 3815180.

It is an arithmetic number, because the mean of its divisors is an integer number (144971292).

Almost surely, 2^1121619849 is an apocalyptic number.

It is an amenable number.

1121619849 is a deficient number, since it is larger than the sum of its proper divisors (618035655).

1121619849 is an equidigital number, since it uses as much as digits as its factorization.

1121619849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7630084 (or 7630077 counting only the distinct ones).

The product of its digits is 31104, while the sum is 42.

The square root of 1121619849 is about 33490.5934405469. The cubic root of 1121619849 is about 1038.9992373155. Note that the first 3 decimals are identical.

The spelling of 1121619849 in words is "one billion, one hundred twenty-one million, six hundred nineteen thousand, eight hundred forty-nine".