1128920213 has 4 divisors (see below), whose sum is σ = 1152939840. Its totient is φ = 1104900588.

The previous prime is 1128920189. The next prime is 1128920227. The reversal of 1128920213 is 3120298211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1128920213 - 2²⁰ = 1127871637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1128920413) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12009743 + ... + 12009836.

It is an arithmetic number, because the mean of its divisors is an integer number (288234960).

Almost surely, 2^1128920213 is an apocalyptic number.

It is an amenable number.

1128920213 is a deficient number, since it is larger than the sum of its proper divisors (24019627).

1128920213 is an equidigital number, since it uses as much as digits as its factorization.

1128920213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24019626.

The product of its (nonzero) digits is 1728, while the sum is 29.

The square root of 1128920213 is about 33599.4079263311. The cubic root of 1128920213 is about 1041.2485660847.

The spelling of 1128920213 in words is "one billion, one hundred twenty-eight million, nine hundred twenty thousand, two hundred thirteen".