120620609 has 2 divisors, whose sum is σ = 120620610. Its totient is φ = 120620608.

The previous prime is 120620587. The next prime is 120620639. The reversal of 120620609 is 906026021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106028209 + 14592400 = 10297^2 + 3820^2 .

It is a cyclic number.

It is not a de Polignac number, because 120620609 - 2¹⁶ = 120555073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120620639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60310304 + 60310305.

It is an arithmetic number, because the mean of its divisors is an integer number (60310305).

Almost surely, 2^120620609 is an apocalyptic number.

It is an amenable number.

120620609 is a deficient number, since it is larger than the sum of its proper divisors (1).

120620609 is an equidigital number, since it uses as much as digits as its factorization.

120620609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 120620609 is about 10982.7414155119. The cubic root of 120620609 is about 494.0912606561.

The spelling of 120620609 in words is "one hundred twenty million, six hundred twenty thousand, six hundred nine".