120655993 has 2 divisors, whose sum is σ = 120655994. Its totient is φ = 120655992.

The previous prime is 120655991. The next prime is 120656027. The reversal of 120655993 is 399556021.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112635769 + 8020224 = 10613^2 + 2832^2 .

It is an emirp because it is prime and its reverse (399556021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120655993 - 2¹ = 120655991 is a prime.

Together with 120655991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (120655991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60327996 + 60327997.

It is an arithmetic number, because the mean of its divisors is an integer number (60327997).

Almost surely, 2^120655993 is an apocalyptic number.

It is an amenable number.

120655993 is a deficient number, since it is larger than the sum of its proper divisors (1).

120655993 is an equidigital number, since it uses as much as digits as its factorization.

120655993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 120655993 is about 10984.3521884543. The cubic root of 120655993 is about 494.1395697470.

The spelling of 120655993 in words is "one hundred twenty million, six hundred fifty-five thousand, nine hundred ninety-three".