383906979 has 8 divisors (see below), whose sum is σ = 568751120. Its totient is φ = 255937968.

The previous prime is 383906969. The next prime is 383906983. The reversal of 383906979 is 979609383.

It is a de Polignac number, because none of the positive numbers 2^k-383906979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (383906909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7109362 + ... + 7109415.

It is an arithmetic number, because the mean of its divisors is an integer number (71093890).

Almost surely, 2^383906979 is an apocalyptic number.

383906979 is a deficient number, since it is larger than the sum of its proper divisors (184844141).

383906979 is a wasteful number, since it uses less digits than its factorization.

383906979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14218786 (or 14218780 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 383906979 is about 19593.5443194946. The cubic root of 383906979 is about 726.7895412907.

It can be divided in two parts, 38390 and 6979, that added together give a square (45369 = 213²).

The spelling of 383906979 in words is "three hundred eighty-three million, nine hundred six thousand, nine hundred seventy-nine".