383698989 has 12 divisors (see below), whose sum is σ = 557953500. Its totient is φ = 254081664.

The previous prime is 383698969. The next prime is 383699009. The reversal of 383698989 is 989896383.

It is an interprime number because it is at equal distance from previous prime (383698969) and next prime (383699009).

It can be written as a sum of positive squares in 2 ways, for example, as 65076489 + 318622500 = 8067^2 + 17850^2 .

It is not a de Polignac number, because 383698989 - 2⁹ = 383698477 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383698969) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141724 + ... + 144405.

It is an arithmetic number, because the mean of its divisors is an integer number (46496125).

Almost surely, 2^383698989 is an apocalyptic number.

It is an amenable number.

383698989 is a deficient number, since it is larger than the sum of its proper divisors (174254511).

383698989 is a wasteful number, since it uses less digits than its factorization.

383698989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 286284 (or 286281 counting only the distinct ones).

The product of its digits is 20155392, while the sum is 63.

The square root of 383698989 is about 19588.2359848966. The cubic root of 383698989 is about 726.6582662058.

The spelling of 383698989 in words is "three hundred eighty-three million, six hundred ninety-eight thousand, nine hundred eighty-nine".