1117634721 has 16 divisors (see below), whose sum is σ = 1703537664. Its totient is φ = 638470224.

The previous prime is 1117634681. The next prime is 1117634731. The reversal of 1117634721 is 1274367111.

It is a happy number.

It is not a de Polignac number, because 1117634721 - 2⁶ = 1117634657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1117634731) 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, 122500 + ... + 131306.

It is an arithmetic number, because the mean of its divisors is an integer number (106471104).

Almost surely, 2^1117634721 is an apocalyptic number.

It is an amenable number.

1117634721 is a deficient number, since it is larger than the sum of its proper divisors (585902943).

1117634721 is an equidigital number, since it uses as much as digits as its factorization.

1117634721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14860.

The product of its digits is 7056, while the sum is 33.

The square root of 1117634721 is about 33431.0442702587. The cubic root of 1117634721 is about 1037.7672517309.

The spelling of 1117634721 in words is "one billion, one hundred seventeen million, six hundred thirty-four thousand, seven hundred twenty-one".