120865399 has 2 divisors, whose sum is σ = 120865400. Its totient is φ = 120865398.

The previous prime is 120865369. The next prime is 120865411. The reversal of 120865399 is 993568021.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (993568021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120865399 - 2¹⁵ = 120832631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120865309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60432699 + 60432700.

It is an arithmetic number, because the mean of its divisors is an integer number (60432700).

Almost surely, 2^120865399 is an apocalyptic number.

120865399 is a deficient number, since it is larger than the sum of its proper divisors (1).

120865399 is an equidigital number, since it uses as much as digits as its factorization.

120865399 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 120865399 is about 10993.8800702937. The cubic root of 120865399 is about 494.4252745372.

The spelling of 120865399 in words is "one hundred twenty million, eight hundred sixty-five thousand, three hundred ninety-nine".