117838949 has 2 divisors, whose sum is σ = 117838950. Its totient is φ = 117838948.

The previous prime is 117838933. The next prime is 117838957. The reversal of 117838949 is 949838711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80102500 + 37736449 = 8950^2 + 6143^2 .

It is a cyclic number.

It is not a de Polignac number, because 117838949 - 2⁴ = 117838933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 117838897 and 117838906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117838909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58919474 + 58919475.

It is an arithmetic number, because the mean of its divisors is an integer number (58919475).

Almost surely, 2^117838949 is an apocalyptic number.

It is an amenable number.

117838949 is a deficient number, since it is larger than the sum of its proper divisors (1).

117838949 is an equidigital number, since it uses as much as digits as its factorization.

117838949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 50.

The square root of 117838949 is about 10855.3649869546. The cubic root of 117838949 is about 490.2635663819.

The spelling of 117838949 in words is "one hundred seventeen million, eight hundred thirty-eight thousand, nine hundred forty-nine".