120906389 has 2 divisors, whose sum is σ = 120906390. Its totient is φ = 120906388.

The previous prime is 120906361. The next prime is 120906403. The reversal of 120906389 is 983609021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117896164 + 3010225 = 10858^2 + 1735^2 .

It is a cyclic number.

It is not a de Polignac number, because 120906389 - 2¹² = 120902293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120906689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60453194 + 60453195.

It is an arithmetic number, because the mean of its divisors is an integer number (60453195).

Almost surely, 2^120906389 is an apocalyptic number.

It is an amenable number.

120906389 is a deficient number, since it is larger than the sum of its proper divisors (1).

120906389 is an equidigital number, since it uses as much as digits as its factorization.

120906389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 120906389 is about 10995.7441312537. The cubic root of 120906389 is about 494.4811609518.

The spelling of 120906389 in words is "one hundred twenty million, nine hundred six thousand, three hundred eighty-nine".