121997339 has 2 divisors, whose sum is σ = 121997340. Its totient is φ = 121997338.

The previous prime is 121997273. The next prime is 121997353. The reversal of 121997339 is 933799121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121997339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121997339.

It is not a weakly prime, because it can be changed into another prime (121991339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60998669 + 60998670.

It is an arithmetic number, because the mean of its divisors is an integer number (60998670).

Almost surely, 2^121997339 is an apocalyptic number.

121997339 is a deficient number, since it is larger than the sum of its proper divisors (1).

121997339 is an equidigital number, since it uses as much as digits as its factorization.

121997339 is an evil number, because the sum of its binary digits is even.

The product of its digits is 91854, while the sum is 44.

The square root of 121997339 is about 11045.2405587203. The cubic root of 121997339 is about 495.9639604299.

The spelling of 121997339 in words is "one hundred twenty-one million, nine hundred ninety-seven thousand, three hundred thirty-nine".