120381887 has 2 divisors, whose sum is σ = 120381888. Its totient is φ = 120381886.

The previous prime is 120381851. The next prime is 120381917. The reversal of 120381887 is 788183021.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120381887 - 2⁶ = 120381823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120381887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120381827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60190943 + 60190944.

It is an arithmetic number, because the mean of its divisors is an integer number (60190944).

Almost surely, 2^120381887 is an apocalyptic number.

120381887 is a deficient number, since it is larger than the sum of its proper divisors (1).

120381887 is an equidigital number, since it uses as much as digits as its factorization.

120381887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 120381887 is about 10971.8679813421. The cubic root of 120381887 is about 493.7650909878.

The spelling of 120381887 in words is "one hundred twenty million, three hundred eighty-one thousand, eight hundred eighty-seven".