1121757789 has 16 divisors (see below), whose sum is σ = 1530888192. Its totient is φ = 730303728.

The previous prime is 1121757779. The next prime is 1121757799. The reversal of 1121757789 is 9877571211.

It is an interprime number because it is at equal distance from previous prime (1121757779) and next prime (1121757799).

It is not a de Polignac number, because 1121757789 - 2¹³ = 1121749597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121757779) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56692 + ... + 73874.

It is an arithmetic number, because the mean of its divisors is an integer number (95680512).

Almost surely, 2^1121757789 is an apocalyptic number.

It is an amenable number.

1121757789 is a deficient number, since it is larger than the sum of its proper divisors (409130403).

1121757789 is a wasteful number, since it uses less digits than its factorization.

1121757789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17696.

The product of its digits is 246960, while the sum is 48.

The square root of 1121757789 is about 33492.6527614640. The cubic root of 1121757789 is about 1039.0418285969.

It can be divided in two parts, 11217 and 57789, that added together give a triangular number (69006 = T₃₇₁).

The spelling of 1121757789 in words is "one billion, one hundred twenty-one million, seven hundred fifty-seven thousand, seven hundred eighty-nine".