117212789 has 2 divisors, whose sum is σ = 117212790. Its totient is φ = 117212788.

The previous prime is 117212779. The next prime is 117212819. The reversal of 117212789 is 987212711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103022500 + 14190289 = 10150^2 + 3767^2 .

It is a cyclic number.

It is not a de Polignac number, because 117212789 - 2⁸ = 117212533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (117212749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58606394 + 58606395.

It is an arithmetic number, because the mean of its divisors is an integer number (58606395).

Almost surely, 2^117212789 is an apocalyptic number.

It is an amenable number.

117212789 is a deficient number, since it is larger than the sum of its proper divisors (1).

117212789 is an equidigital number, since it uses as much as digits as its factorization.

117212789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14112, while the sum is 38.

The square root of 117212789 is about 10826.4855331728. The cubic root of 117212789 is about 489.3936537122.

The spelling of 117212789 in words is "one hundred seventeen million, two hundred twelve thousand, seven hundred eighty-nine".