383145979 has 4 divisors (see below), whose sum is σ = 387451080. Its totient is φ = 378840880.

The previous prime is 383145967. The next prime is 383146003. The reversal of 383145979 is 979541383.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 383145979 - 2¹⁹ = 382621691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (383145079) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2152417 + ... + 2152594.

It is an arithmetic number, because the mean of its divisors is an integer number (96862770).

Almost surely, 2^383145979 is an apocalyptic number.

383145979 is a deficient number, since it is larger than the sum of its proper divisors (4305101).

383145979 is an equidigital number, since it uses as much as digits as its factorization.

383145979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4305100.

The product of its digits is 816480, while the sum is 49.

The square root of 383145979 is about 19574.1150246952. The cubic root of 383145979 is about 726.3089971950.

The spelling of 383145979 in words is "three hundred eighty-three million, one hundred forty-five thousand, nine hundred seventy-nine".