120139889 has 2 divisors, whose sum is σ = 120139890. Its totient is φ = 120139888.

The previous prime is 120139847. The next prime is 120139891. The reversal of 120139889 is 988931021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80550625 + 39589264 = 8975^2 + 6292^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120139889 is a prime.

Together with 120139891, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120139819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60069944 + 60069945.

It is an arithmetic number, because the mean of its divisors is an integer number (60069945).

Almost surely, 2^120139889 is an apocalyptic number.

It is an amenable number.

120139889 is a deficient number, since it is larger than the sum of its proper divisors (1).

120139889 is an equidigital number, since it uses as much as digits as its factorization.

120139889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 120139889 is about 10960.8343204338. The cubic root of 120139889 is about 493.4340048488.

The spelling of 120139889 in words is "one hundred twenty million, one hundred thirty-nine thousand, eight hundred eighty-nine".