1117653779 has 8 divisors (see below), whose sum is σ = 1231331760. Its totient is φ = 1005988000.

The previous prime is 1117653769. The next prime is 1117653781. The reversal of 1117653779 is 9773567111.

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 a de Polignac number, because none of the positive numbers 2^k-1117653779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1117653769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 501884 + ... + 504105.

It is an arithmetic number, because the mean of its divisors is an integer number (153916470).

Almost surely, 2^1117653779 is an apocalyptic number.

1117653779 is a deficient number, since it is larger than the sum of its proper divisors (113677981).

1117653779 is a wasteful number, since it uses less digits than its factorization.

1117653779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006101.

The product of its digits is 277830, while the sum is 47.

The square root of 1117653779 is about 33431.3293035141. The cubic root of 1117653779 is about 1037.7731503951.

The spelling of 1117653779 in words is "one billion, one hundred seventeen million, six hundred fifty-three thousand, seven hundred seventy-nine".