385545917 has 2 divisors, whose sum is σ = 385545918. Its totient is φ = 385545916.

The previous prime is 385545893. The next prime is 385545947. The reversal of 385545917 is 719545583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 359064601 + 26481316 = 18949^2 + 5146^2 .

It is a cyclic number.

It is not a de Polignac number, because 385545917 - 2¹⁰ = 385544893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385545947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192772958 + 192772959.

It is an arithmetic number, because the mean of its divisors is an integer number (192772959).

Almost surely, 2^385545917 is an apocalyptic number.

It is an amenable number.

385545917 is a deficient number, since it is larger than the sum of its proper divisors (1).

385545917 is an equidigital number, since it uses as much as digits as its factorization.

385545917 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756000, while the sum is 47.

The square root of 385545917 is about 19635.3231957103. The cubic root of 385545917 is about 727.8223191994.

The spelling of 385545917 in words is "three hundred eighty-five million, five hundred forty-five thousand, nine hundred seventeen".