117198649 has 4 divisors (see below), whose sum is σ = 117793764. Its totient is φ = 116603536.

The previous prime is 117198643. The next prime is 117198661. The reversal of 117198649 is 946891711.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96432400 + 20766249 = 9820^2 + 4557^2 .

It is a cyclic number.

It is not a de Polignac number, because 117198649 - 2⁵ = 117198617 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 117198599 and 117198608.

It is not an unprimeable number, because it can be changed into a prime (117198643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297262 + ... + 297655.

It is an arithmetic number, because the mean of its divisors is an integer number (29448441).

Almost surely, 2^117198649 is an apocalyptic number.

It is an amenable number.

117198649 is a deficient number, since it is larger than the sum of its proper divisors (595115).

117198649 is an equidigital number, since it uses as much as digits as its factorization.

117198649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 595114.

The product of its digits is 108864, while the sum is 46.

The square root of 117198649 is about 10825.8324853103. The cubic root of 117198649 is about 489.3739735373.

The spelling of 117198649 in words is "one hundred seventeen million, one hundred ninety-eight thousand, six hundred forty-nine".