385450391 has 2 divisors, whose sum is σ = 385450392. Its totient is φ = 385450390.

The previous prime is 385450361. The next prime is 385450393. The reversal of 385450391 is 193054583.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (193054583) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 385450391 - 2¹⁰ = 385449367 is a prime.

Together with 385450393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385450393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192725195 + 192725196.

It is an arithmetic number, because the mean of its divisors is an integer number (192725196).

Almost surely, 2^385450391 is an apocalyptic number.

385450391 is a deficient number, since it is larger than the sum of its proper divisors (1).

385450391 is an equidigital number, since it uses as much as digits as its factorization.

385450391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 385450391 is about 19632.8905411302. The cubic root of 385450391 is about 727.7622038368.

It can be divided in two parts, 3854 and 50391, that added together give a palindrome (54245).

The spelling of 385450391 in words is "three hundred eighty-five million, four hundred fifty thousand, three hundred ninety-one".