117251993 has 2 divisors, whose sum is σ = 117251994. Its totient is φ = 117251992.

The previous prime is 117251977. The next prime is 117252041. The reversal of 117251993 is 399152711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 98346889 + 18905104 = 9917^2 + 4348^2 .

It is an emirp because it is prime and its reverse (399152711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117251993 - 2⁴ = 117251977 is a prime.

It is not a weakly prime, because it can be changed into another prime (117251933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58625996 + 58625997.

It is an arithmetic number, because the mean of its divisors is an integer number (58625997).

Almost surely, 2^117251993 is an apocalyptic number.

It is an amenable number.

117251993 is a deficient number, since it is larger than the sum of its proper divisors (1).

117251993 is an equidigital number, since it uses as much as digits as its factorization.

117251993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17010, while the sum is 38.

The square root of 117251993 is about 10828.2959416521. The cubic root of 117251993 is about 489.4482099038.

The spelling of 117251993 in words is "one hundred seventeen million, two hundred fifty-one thousand, nine hundred ninety-three".