385021477 has 2 divisors, whose sum is σ = 385021478. Its totient is φ = 385021476.

The previous prime is 385021451. The next prime is 385021493. The reversal of 385021477 is 774120583.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 384708996 + 312481 = 19614^2 + 559^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-385021477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385024477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192510738 + 192510739.

It is an arithmetic number, because the mean of its divisors is an integer number (192510739).

Almost surely, 2^385021477 is an apocalyptic number.

It is an amenable number.

385021477 is a deficient number, since it is larger than the sum of its proper divisors (1).

385021477 is an equidigital number, since it uses as much as digits as its factorization.

385021477 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 385021477 is about 19621.9641473528. The cubic root of 385021477 is about 727.4921619511.

The spelling of 385021477 in words is "three hundred eighty-five million, twenty-one thousand, four hundred seventy-seven".