396149989 has 2 divisors, whose sum is σ = 396149990. Its totient is φ = 396149988.

The previous prime is 396149969. The next prime is 396150047. The reversal of 396149989 is 989941693.

It is an a-pointer prime, because the next prime (396150047) can be obtained adding 396149989 to its sum of digits (58).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 287302500 + 108847489 = 16950^2 + 10433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396149989 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396149959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198074994 + 198074995.

It is an arithmetic number, because the mean of its divisors is an integer number (198074995).

Almost surely, 2^396149989 is an apocalyptic number.

It is an amenable number.

396149989 is a deficient number, since it is larger than the sum of its proper divisors (1).

396149989 is an equidigital number, since it uses as much as digits as its factorization.

396149989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3779136, while the sum is 58.

The square root of 396149989 is about 19903.5170007715. The cubic root of 396149989 is about 734.4347476580.

The spelling of 396149989 in words is "three hundred ninety-six million, one hundred forty-nine thousand, nine hundred eighty-nine".