120999547 has 2 divisors, whose sum is σ = 120999548. Its totient is φ = 120999546.

The previous prime is 120999503. The next prime is 120999553. The reversal of 120999547 is 745999021.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 120999547 - 2⁷ = 120999419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120999497 and 120999506.

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

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60499773 + 60499774.

It is an arithmetic number, because the mean of its divisors is an integer number (60499774).

Almost surely, 2^120999547 is an apocalyptic number.

120999547 is a deficient number, since it is larger than the sum of its proper divisors (1).

120999547 is an equidigital number, since it uses as much as digits as its factorization.

120999547 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 120999547 is about 10999.9794090716. The cubic root of 120999547 is about 494.6081270851.

The spelling of 120999547 in words is "one hundred twenty million, nine hundred ninety-nine thousand, five hundred forty-seven".