117210913 has 2 divisors, whose sum is σ = 117210914. Its totient is φ = 117210912.

The previous prime is 117210901. The next prime is 117210949. The reversal of 117210913 is 319012711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90098064 + 27112849 = 9492^2 + 5207^2 .

It is an emirp because it is prime and its reverse (319012711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117210913 - 2¹³ = 117202721 is a prime.

It is not a weakly prime, because it can be changed into another prime (117210013) 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 as a sum of consecutive naturals, namely, 58605456 + 58605457.

It is an arithmetic number, because the mean of its divisors is an integer number (58605457).

Almost surely, 2^117210913 is an apocalyptic number.

It is an amenable number.

117210913 is a deficient number, since it is larger than the sum of its proper divisors (1).

117210913 is an equidigital number, since it uses as much as digits as its factorization.

117210913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 117210913 is about 10826.3988934456. The cubic root of 117210913 is about 489.3910427701.

The spelling of 117210913 in words is "one hundred seventeen million, two hundred ten thousand, nine hundred thirteen".