385135397 has 2 divisors, whose sum is σ = 385135398. Its totient is φ = 385135396.

The previous prime is 385135369. The next prime is 385135403. The reversal of 385135397 is 793531583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210076036 + 175059361 = 14494^2 + 13231^2 .

It is a cyclic number.

It is not a de Polignac number, because 385135397 - 2²⁸ = 116699941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385135337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192567698 + 192567699.

It is an arithmetic number, because the mean of its divisors is an integer number (192567699).

Almost surely, 2^385135397 is an apocalyptic number.

It is an amenable number.

385135397 is a deficient number, since it is larger than the sum of its proper divisors (1).

385135397 is an equidigital number, since it uses as much as digits as its factorization.

385135397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 44.

The square root of 385135397 is about 19624.8668020958. The cubic root of 385135397 is about 727.5639049054.

The spelling of 385135397 in words is "three hundred eighty-five million, one hundred thirty-five thousand, three hundred ninety-seven".