120999997 has 2 divisors, whose sum is σ = 120999998. Its totient is φ = 120999996.

The previous prime is 120999947. The next prime is 121000003. The reversal of 120999997 is 799999021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92044836 + 28955161 = 9594^2 + 5381^2 .

It is a cyclic number.

It is not a de Polignac number, because 120999997 - 2⁷ = 120999869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120999947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60499998 + 60499999.

It is an arithmetic number, because the mean of its divisors is an integer number (60499999).

Almost surely, 2^120999997 is an apocalyptic number.

It is an amenable number.

120999997 is a deficient number, since it is larger than the sum of its proper divisors (1).

120999997 is an equidigital number, since it uses as much as digits as its factorization.

120999997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 826686, while the sum is 55.

The square root of 120999997 is about 10999.9998636364. Note that the first 3 decimals coincide. The cubic root of 120999997 is about 494.6087402372.

The spelling of 120999997 in words is "one hundred twenty million, nine hundred ninety-nine thousand, nine hundred ninety-seven".