120193861 has 2 divisors, whose sum is σ = 120193862. Its totient is φ = 120193860.

The previous prime is 120193831. The next prime is 120193889. The reversal of 120193861 is 168391021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114361636 + 5832225 = 10694^2 + 2415^2 .

It is an emirp because it is prime and its reverse (168391021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120193861 - 2¹³ = 120185669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120193831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60096930 + 60096931.

It is an arithmetic number, because the mean of its divisors is an integer number (60096931).

Almost surely, 2^120193861 is an apocalyptic number.

It is an amenable number.

120193861 is a deficient number, since it is larger than the sum of its proper divisors (1).

120193861 is an equidigital number, since it uses as much as digits as its factorization.

120193861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 120193861 is about 10963.2960828393. The cubic root of 120193861 is about 493.5078843718.

The spelling of 120193861 in words is "one hundred twenty million, one hundred ninety-three thousand, eight hundred sixty-one".