1117657789 has 8 divisors (see below), whose sum is σ = 1139285952. Its totient is φ = 1096193280.

The previous prime is 1117657781. The next prime is 1117657859. The reversal of 1117657789 is 9877567111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1117657789 - 2³ = 1117657781 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 (1117657781) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27079 + ... + 54484.

It is an arithmetic number, because the mean of its divisors is an integer number (142410744).

Almost surely, 2^1117657789 is an apocalyptic number.

It is an amenable number.

1117657789 is a deficient number, since it is larger than the sum of its proper divisors (21628163).

1117657789 is an equidigital number, since it uses as much as digits as its factorization.

1117657789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81827.

The product of its digits is 740880, while the sum is 52.

The square root of 1117657789 is about 33431.3892771449. The cubic root of 1117657789 is about 1037.7743915264.

The spelling of 1117657789 in words is "one billion, one hundred seventeen million, six hundred fifty-seven thousand, seven hundred eighty-nine".