389942099 has 2 divisors, whose sum is σ = 389942100. Its totient is φ = 389942098.

The previous prime is 389942083. The next prime is 389942117. The reversal of 389942099 is 990249983.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 389942099 - 2⁴ = 389942083 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 389942099.

It is not a weakly prime, because it can be changed into another prime (389942009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 194971049 + 194971050.

It is an arithmetic number, because the mean of its divisors is an integer number (194971050).

Almost surely, 2^389942099 is an apocalyptic number.

389942099 is a deficient number, since it is larger than the sum of its proper divisors (1).

389942099 is an equidigital number, since it uses as much as digits as its factorization.

389942099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The square root of 389942099 is about 19746.9516381643. The cubic root of 389942099 is about 730.5781989485.

The spelling of 389942099 in words is "three hundred eighty-nine million, nine hundred forty-two thousand, ninety-nine".