120131989 has 2 divisors, whose sum is σ = 120131990. Its totient is φ = 120131988.

The previous prime is 120131987. The next prime is 120132017. The reversal of 120131989 is 989131021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81902500 + 38229489 = 9050^2 + 6183^2 .

It is a cyclic number.

It is not a de Polignac number, because 120131989 - 2¹ = 120131987 is a prime.

It is a super-2 number, since 2×120131989² = 28863389562192242, which contains 22 as substring.

Together with 120131987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120131987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60065994 + 60065995.

It is an arithmetic number, because the mean of its divisors is an integer number (60065995).

Almost surely, 2^120131989 is an apocalyptic number.

It is an amenable number.

120131989 is a deficient number, since it is larger than the sum of its proper divisors (1).

120131989 is an equidigital number, since it uses as much as digits as its factorization.

120131989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 34.

The square root of 120131989 is about 10960.4739404827. The cubic root of 120131989 is about 493.4231890848.

The spelling of 120131989 in words is "one hundred twenty million, one hundred thirty-one thousand, nine hundred eighty-nine".