395529989 has 2 divisors, whose sum is σ = 395529990. Its totient is φ = 395529988.

The previous prime is 395529983. The next prime is 395530001. The reversal of 395529989 is 989925593.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 383572225 + 11957764 = 19585^2 + 3458^2 .

It is a cyclic number.

It is not a de Polignac number, because 395529989 - 2¹⁶ = 395464453 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395529983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197764994 + 197764995.

It is an arithmetic number, because the mean of its divisors is an integer number (197764995).

Almost surely, 2^395529989 is an apocalyptic number.

It is an amenable number.

395529989 is a deficient number, since it is larger than the sum of its proper divisors (1).

395529989 is an equidigital number, since it uses as much as digits as its factorization.

395529989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7873200, while the sum is 59.

The square root of 395529989 is about 19887.9357651819. The cubic root of 395529989 is about 734.0514018602.

The spelling of 395529989 in words is "three hundred ninety-five million, five hundred twenty-nine thousand, nine hundred eighty-nine".