1121750789 has 4 divisors (see below), whose sum is σ = 1121970624. Its totient is φ = 1121530956.

The previous prime is 1121750771. The next prime is 1121750801. The reversal of 1121750789 is 9870571211.

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 1121750789 - 2¹² = 1121746693 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 (1121750689) 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, 102077 + ... + 112530.

It is an arithmetic number, because the mean of its divisors is an integer number (280492656).

Almost surely, 2^1121750789 is an apocalyptic number.

It is an amenable number.

1121750789 is a deficient number, since it is larger than the sum of its proper divisors (219835).

1121750789 is an equidigital number, since it uses as much as digits as its factorization.

1121750789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219834.

The product of its (nonzero) digits is 35280, while the sum is 41.

The square root of 1121750789 is about 33492.5482607699. The cubic root of 1121750789 is about 1039.0396673140.

The spelling of 1121750789 in words is "one billion, one hundred twenty-one million, seven hundred fifty thousand, seven hundred eighty-nine".