383938545493 has 4 divisors (see below), whose sum is σ = 387460917580. Its totient is φ = 380416173408.

The previous prime is 383938545479. The next prime is 383938545533. The reversal of 383938545493 is 394545839383.

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

It can be written as a sum of positive squares in 2 ways, for example, as 271323266769 + 112615278724 = 520887^2 + 335582^2 .

It is a cyclic number.

It is not a de Polignac number, because 383938545493 - 2⁵ = 383938545461 is a prime.

It is a super-2 number, since 2×383938545493² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383938545433) 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, 1761185880 + ... + 1761186097.

It is an arithmetic number, because the mean of its divisors is an integer number (96865229395).

Almost surely, 2^383938545493 is an apocalyptic number.

It is an amenable number.

383938545493 is a deficient number, since it is larger than the sum of its proper divisors (3522372087).

383938545493 is a wasteful number, since it uses less digits than its factorization.

383938545493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3522372086.

The product of its digits is 167961600, while the sum is 64.

The spelling of 383938545493 in words is "three hundred eighty-three billion, nine hundred thirty-eight million, five hundred forty-five thousand, four hundred ninety-three".