120915997 has 2 divisors, whose sum is σ = 120915998. Its totient is φ = 120915996.

The previous prime is 120915979. The next prime is 120916001. The reversal of 120915997 is 799519021.

Together with previous prime (120915979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 120868036 + 47961 = 10994^2 + 219^2 .

It is a cyclic number.

It is not a de Polignac number, because 120915997 - 2⁷ = 120915869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120915497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60457998 + 60457999.

It is an arithmetic number, because the mean of its divisors is an integer number (60457999).

Almost surely, 2^120915997 is an apocalyptic number.

It is an amenable number.

120915997 is a deficient number, since it is larger than the sum of its proper divisors (1).

120915997 is an equidigital number, since it uses as much as digits as its factorization.

120915997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51030, while the sum is 43.

The square root of 120915997 is about 10996.1810188811. The cubic root of 120915997 is about 494.4942588236.

The spelling of 120915997 in words is "one hundred twenty million, nine hundred fifteen thousand, nine hundred ninety-seven".