120392989 has 2 divisors, whose sum is σ = 120392990. Its totient is φ = 120392988.

The previous prime is 120392977. The next prime is 120392999. The reversal of 120392989 is 989293021.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87272964 + 33120025 = 9342^2 + 5755^2 .

It is an emirp because it is prime and its reverse (989293021) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120392989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120392939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60196494 + 60196495.

It is an arithmetic number, because the mean of its divisors is an integer number (60196495).

Almost surely, 2^120392989 is an apocalyptic number.

It is an amenable number.

120392989 is a deficient number, since it is larger than the sum of its proper divisors (1).

120392989 is an equidigital number, since it uses as much as digits as its factorization.

120392989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 120392989 is about 10972.3738999361. The cubic root of 120392989 is about 493.7802693829.

The spelling of 120392989 in words is "one hundred twenty million, three hundred ninety-two thousand, nine hundred eighty-nine".