385346869 has 2 divisors, whose sum is σ = 385346870. Its totient is φ = 385346868.

The previous prime is 385346851. The next prime is 385346879. The reversal of 385346869 is 968643583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208802500 + 176544369 = 14450^2 + 13287^2 .

It is a cyclic number.

It is not a de Polignac number, because 385346869 - 2²³ = 376958261 is a prime.

It is a super-2 number, since 2×385346869² = 296984418896206322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385346879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192673434 + 192673435.

It is an arithmetic number, because the mean of its divisors is an integer number (192673435).

Almost surely, 2^385346869 is an apocalyptic number.

It is an amenable number.

385346869 is a deficient number, since it is larger than the sum of its proper divisors (1).

385346869 is an equidigital number, since it uses as much as digits as its factorization.

385346869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3732480, while the sum is 52.

The square root of 385346869 is about 19630.2539209252. The cubic root of 385346869 is about 727.6970453051.

The spelling of 385346869 in words is "three hundred eighty-five million, three hundred forty-six thousand, eight hundred sixty-nine".