120728957 has 2 divisors, whose sum is σ = 120728958. Its totient is φ = 120728956.

The previous prime is 120728939. The next prime is 120728977. The reversal of 120728957 is 759827021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66765241 + 53963716 = 8171^2 + 7346^2 .

It is an emirp because it is prime and its reverse (759827021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120728957 - 2⁶ = 120728893 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120728977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60364478 + 60364479.

It is an arithmetic number, because the mean of its divisors is an integer number (60364479).

Almost surely, 2^120728957 is an apocalyptic number.

It is an amenable number.

120728957 is a deficient number, since it is larger than the sum of its proper divisors (1).

120728957 is an equidigital number, since it uses as much as digits as its factorization.

120728957 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 120728957 is about 10987.6729565454. The cubic root of 120728957 is about 494.2391562751.

The spelling of 120728957 in words is "one hundred twenty million, seven hundred twenty-eight thousand, nine hundred fifty-seven".