1121866623 has 12 divisors (see below), whose sum is σ = 1621226880. Its totient is φ = 747563616.

The previous prime is 1121866621. The next prime is 1121866639. The reversal of 1121866623 is 3266681211.

It is a happy number.

It is not a de Polignac number, because 1121866623 - 2¹ = 1121866621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121866621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7686 + ... + 47987.

It is an arithmetic number, because the mean of its divisors is an integer number (135102240).

Almost surely, 2^1121866623 is an apocalyptic number.

1121866623 is a deficient number, since it is larger than the sum of its proper divisors (499360257).

1121866623 is a wasteful number, since it uses less digits than its factorization.

1121866623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57918 (or 57915 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1121866623 is about 33494.2774664569. The cubic root of 1121866623 is about 1039.0754304501.

It can be divided in two parts, 11218 and 66623, that added together give a square (77841 = 279²).

The spelling of 1121866623 in words is "one billion, one hundred twenty-one million, eight hundred sixty-six thousand, six hundred twenty-three".