120909857 has 2 divisors, whose sum is σ = 120909858. Its totient is φ = 120909856.

The previous prime is 120909853. The next prime is 120909911. The reversal of 120909857 is 758909021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81018001 + 39891856 = 9001^2 + 6316^2 .

It is a cyclic number.

It is not a de Polignac number, because 120909857 - 2² = 120909853 is a prime.

It is not a weakly prime, because it can be changed into another prime (120909853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60454928 + 60454929.

It is an arithmetic number, because the mean of its divisors is an integer number (60454929).

Almost surely, 2^120909857 is an apocalyptic number.

It is an amenable number.

120909857 is a deficient number, since it is larger than the sum of its proper divisors (1).

120909857 is an equidigital number, since it uses as much as digits as its factorization.

120909857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 41.

The square root of 120909857 is about 10995.9018274992. The cubic root of 120909857 is about 494.4858886983.

The spelling of 120909857 in words is "one hundred twenty million, nine hundred nine thousand, eight hundred fifty-seven".