117890237 has 2 divisors, whose sum is σ = 117890238. Its totient is φ = 117890236.

The previous prime is 117890197. The next prime is 117890243. The reversal of 117890237 is 732098711.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68244121 + 49646116 = 8261^2 + 7046^2 .

It is an emirp because it is prime and its reverse (732098711) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 117890237 - 2⁶ = 117890173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 117890237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117890287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58945118 + 58945119.

It is an arithmetic number, because the mean of its divisors is an integer number (58945119).

Almost surely, 2^117890237 is an apocalyptic number.

It is an amenable number.

117890237 is a deficient number, since it is larger than the sum of its proper divisors (1).

117890237 is an equidigital number, since it uses as much as digits as its factorization.

117890237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 38.

The square root of 117890237 is about 10857.7270641696. The cubic root of 117890237 is about 490.3346831926.

The spelling of 117890237 in words is "one hundred seventeen million, eight hundred ninety thousand, two hundred thirty-seven".