385343999 has 2 divisors, whose sum is σ = 385344000. Its totient is φ = 385343998.

The previous prime is 385343989. The next prime is 385344007. The reversal of 385343999 is 999343583.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385343999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 385343999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385343939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192671999 + 192672000.

It is an arithmetic number, because the mean of its divisors is an integer number (192672000).

Almost surely, 2^385343999 is an apocalyptic number.

385343999 is a deficient number, since it is larger than the sum of its proper divisors (1).

385343999 is an equidigital number, since it uses as much as digits as its factorization.

385343999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3149280, while the sum is 53.

The square root of 385343999 is about 19630.1808193404. The cubic root of 385343999 is about 727.6952387114.

The spelling of 385343999 in words is "three hundred eighty-five million, three hundred forty-three thousand, nine hundred ninety-nine".