1117909157 has 8 divisors (see below), whose sum is σ = 1176127512. Its totient is φ = 1061164800.

The previous prime is 1117909151. The next prime is 1117909159. The reversal of 1117909157 is 7519097111.

It can be written as a sum of positive squares in 4 ways, for example, as 258598561 + 859310596 = 16081^2 + 29314^2 .

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 1117909157 - 2⁸ = 1117908901 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1117909151) 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, 366944 + ... + 369977.

It is an arithmetic number, because the mean of its divisors is an integer number (147015939).

Almost surely, 2^1117909157 is an apocalyptic number.

It is an amenable number.

1117909157 is a deficient number, since it is larger than the sum of its proper divisors (58218355).

1117909157 is an equidigital number, since it uses as much as digits as its factorization.

1117909157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736999.

The product of its (nonzero) digits is 19845, while the sum is 41.

The square root of 1117909157 is about 33435.1485266628. The cubic root of 1117909157 is about 1037.8521862747.

The spelling of 1117909157 in words is "one billion, one hundred seventeen million, nine hundred nine thousand, one hundred fifty-seven".