385355591 has 2 divisors, whose sum is σ = 385355592. Its totient is φ = 385355590.

The previous prime is 385355533. The next prime is 385355599. The reversal of 385355591 is 195553583.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 385355591 - 2²⁶ = 318246727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385355599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192677795 + 192677796.

It is an arithmetic number, because the mean of its divisors is an integer number (192677796).

Almost surely, 2^385355591 is an apocalyptic number.

385355591 is a deficient number, since it is larger than the sum of its proper divisors (1).

385355591 is an equidigital number, since it uses as much as digits as its factorization.

385355591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 405000, while the sum is 44.

The square root of 385355591 is about 19630.4760767537. The cubic root of 385355591 is about 727.7025355324.

The spelling of 385355591 in words is "three hundred eighty-five million, three hundred fifty-five thousand, five hundred ninety-one".