385203457 has 2 divisors, whose sum is σ = 385203458. Its totient is φ = 385203456.

The previous prime is 385203443. The next prime is 385203461. The reversal of 385203457 is 754302583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 377563761 + 7639696 = 19431^2 + 2764^2 .

It is an emirp because it is prime and its reverse (754302583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385203457 - 2¹¹ = 385201409 is a prime.

It is not a weakly prime, because it can be changed into another prime (385203437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192601728 + 192601729.

It is an arithmetic number, because the mean of its divisors is an integer number (192601729).

Almost surely, 2^385203457 is an apocalyptic number.

It is an amenable number.

385203457 is a deficient number, since it is larger than the sum of its proper divisors (1).

385203457 is an equidigital number, since it uses as much as digits as its factorization.

385203457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 37.

The square root of 385203457 is about 19626.6007500025. The cubic root of 385203457 is about 727.6067600356.

The spelling of 385203457 in words is "three hundred eighty-five million, two hundred three thousand, four hundred fifty-seven".