385678957 has 2 divisors, whose sum is σ = 385678958. Its totient is φ = 385678956.

The previous prime is 385678907. The next prime is 385678999. The reversal of 385678957 is 759876583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 302029641 + 83649316 = 17379^2 + 9146^2 .

It is an emirp because it is prime and its reverse (759876583) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385678957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385678907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192839478 + 192839479.

It is an arithmetic number, because the mean of its divisors is an integer number (192839479).

Almost surely, 2^385678957 is an apocalyptic number.

It is an amenable number.

385678957 is a deficient number, since it is larger than the sum of its proper divisors (1).

385678957 is an equidigital number, since it uses as much as digits as its factorization.

385678957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12700800, while the sum is 58.

The square root of 385678957 is about 19638.7106756019. The cubic root of 385678957 is about 727.9060259138.

It can be divided in two parts, 38567 and 8957, that added together give a square (47524 = 218²).

The spelling of 385678957 in words is "three hundred eighty-five million, six hundred seventy-eight thousand, nine hundred fifty-seven".