121610539 has 2 divisors, whose sum is σ = 121610540. Its totient is φ = 121610538.

The previous prime is 121610513. The next prime is 121610563. The reversal of 121610539 is 935016121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121610539 - 2¹³ = 121602347 is a prime.

It is not a weakly prime, because it can be changed into another prime (121610239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60805269 + 60805270.

It is an arithmetic number, because the mean of its divisors is an integer number (60805270).

Almost surely, 2^121610539 is an apocalyptic number.

121610539 is a deficient number, since it is larger than the sum of its proper divisors (1).

121610539 is an equidigital number, since it uses as much as digits as its factorization.

121610539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 121610539 is about 11027.7168534561. The cubic root of 121610539 is about 495.4392441671.

The spelling of 121610539 in words is "one hundred twenty-one million, six hundred ten thousand, five hundred thirty-nine".