385465897 has 2 divisors, whose sum is σ = 385465898. Its totient is φ = 385465896.

The previous prime is 385465849. The next prime is 385465903. The reversal of 385465897 is 798564583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 309619216 + 75846681 = 17596^2 + 8709^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385465897 is a prime.

It is not a weakly prime, because it can be changed into another prime (385465097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192732948 + 192732949.

It is an arithmetic number, because the mean of its divisors is an integer number (192732949).

Almost surely, 2^385465897 is an apocalyptic number.

It is an amenable number.

385465897 is a deficient number, since it is larger than the sum of its proper divisors (1).

385465897 is an equidigital number, since it uses as much as digits as its factorization.

385465897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7257600, while the sum is 55.

The square root of 385465897 is about 19633.2854357084. The cubic root of 385465897 is about 727.7719625759.

It can be divided in two parts, 3854 and 65897, that added together give a triangular number (69751 = T₃₇₃).

The spelling of 385465897 in words is "three hundred eighty-five million, four hundred sixty-five thousand, eight hundred ninety-seven".