1117657157 has 4 divisors (see below), whose sum is σ = 1119318540. Its totient is φ = 1115995776.

The previous prime is 1117657141. The next prime is 1117657199. The reversal of 1117657157 is 7517567111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7517567111 = 16633 ⋅451967.

It can be written as a sum of positive squares in 2 ways, for example, as 198415396 + 919241761 = 14086^2 + 30319^2 .

It is a cyclic number.

It is not a de Polignac number, because 1117657157 - 2⁴ = 1117657141 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 (1117657117) 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, 829682 + ... + 831027.

It is an arithmetic number, because the mean of its divisors is an integer number (279829635).

Almost surely, 2^1117657157 is an apocalyptic number.

It is an amenable number.

1117657157 is a deficient number, since it is larger than the sum of its proper divisors (1661383).

1117657157 is an equidigital number, since it uses as much as digits as its factorization.

1117657157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1661382.

The product of its digits is 51450, while the sum is 41.

The square root of 1117657157 is about 33431.3798249489. The cubic root of 1117657157 is about 1037.7741959169.

The spelling of 1117657157 in words is "one billion, one hundred seventeen million, six hundred fifty-seven thousand, one hundred fifty-seven".