120131917 has 2 divisors, whose sum is σ = 120131918. Its totient is φ = 120131916.

The previous prime is 120131897. The next prime is 120131923. The reversal of 120131917 is 719131021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90744676 + 29387241 = 9526^2 + 5421^2 .

It is a cyclic number.

It is not a de Polignac number, because 120131917 - 2¹¹ = 120129869 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120131891 and 120131900.

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, 60065958 + 60065959.

It is an arithmetic number, because the mean of its divisors is an integer number (60065959).

Almost surely, 2^120131917 is an apocalyptic number.

It is an amenable number.

120131917 is a deficient number, since it is larger than the sum of its proper divisors (1).

120131917 is an equidigital number, since it uses as much as digits as its factorization.

120131917 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 25.

The square root of 120131917 is about 10960.4706559527. The cubic root of 120131917 is about 493.4230905085.

Adding to 120131917 its reverse (719131021), we get a palindrome (839262938).

The spelling of 120131917 in words is "one hundred twenty million, one hundred thirty-one thousand, nine hundred seventeen".