120409889 has 2 divisors, whose sum is σ = 120409890. Its totient is φ = 120409888.

The previous prime is 120409831. The next prime is 120409901. The reversal of 120409889 is 988904021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111999889 + 8410000 = 10583^2 + 2900^2 .

It is a cyclic number.

It is not a de Polignac number, because 120409889 - 2⁸ = 120409633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (120409819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60204944 + 60204945.

It is an arithmetic number, because the mean of its divisors is an integer number (60204945).

Almost surely, 2^120409889 is an apocalyptic number.

It is an amenable number.

120409889 is a deficient number, since it is larger than the sum of its proper divisors (1).

120409889 is an equidigital number, since it uses as much as digits as its factorization.

120409889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 120409889 is about 10973.1439888484. The cubic root of 120409889 is about 493.8033728769.

The spelling of 120409889 in words is "one hundred twenty million, four hundred nine thousand, eight hundred eighty-nine".