385978349 has 2 divisors, whose sum is σ = 385978350. Its totient is φ = 385978348.

The previous prime is 385978343. The next prime is 385978379. The reversal of 385978349 is 943879583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 364122724 + 21855625 = 19082^2 + 4675^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385978349 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 385978294 and 385978303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385978343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192989174 + 192989175.

It is an arithmetic number, because the mean of its divisors is an integer number (192989175).

Almost surely, 2^385978349 is an apocalyptic number.

It is an amenable number.

385978349 is a deficient number, since it is larger than the sum of its proper divisors (1).

385978349 is an equidigital number, since it uses as much as digits as its factorization.

385978349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6531840, while the sum is 56.

The square root of 385978349 is about 19646.3316932195. The cubic root of 385978349 is about 728.0943283610.

The spelling of 385978349 in words is "three hundred eighty-five million, nine hundred seventy-eight thousand, three hundred forty-nine".