121539343 has 2 divisors, whose sum is σ = 121539344. Its totient is φ = 121539342.

The previous prime is 121539331. The next prime is 121539349. The reversal of 121539343 is 343935121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121539343 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121539349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60769671 + 60769672.

It is an arithmetic number, because the mean of its divisors is an integer number (60769672).

Almost surely, 2^121539343 is an apocalyptic number.

121539343 is a deficient number, since it is larger than the sum of its proper divisors (1).

121539343 is an equidigital number, since it uses as much as digits as its factorization.

121539343 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 31.

The square root of 121539343 is about 11024.4883327980. The cubic root of 121539343 is about 495.3425415336.

The spelling of 121539343 in words is "one hundred twenty-one million, five hundred thirty-nine thousand, three hundred forty-three".