385722109 has 2 divisors, whose sum is σ = 385722110. Its totient is φ = 385722108.

The previous prime is 385722067. The next prime is 385722179. The reversal of 385722109 is 901227583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 220522500 + 165199609 = 14850^2 + 12853^2 .

It is a cyclic number.

It is not a de Polignac number, because 385722109 - 2¹³ = 385713917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (385722179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192861054 + 192861055.

It is an arithmetic number, because the mean of its divisors is an integer number (192861055).

Almost surely, 2^385722109 is an apocalyptic number.

It is an amenable number.

385722109 is a deficient number, since it is larger than the sum of its proper divisors (1).

385722109 is an equidigital number, since it uses as much as digits as its factorization.

385722109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 385722109 is about 19639.8092913348. The cubic root of 385722109 is about 727.9331723516.

The spelling of 385722109 in words is "three hundred eighty-five million, seven hundred twenty-two thousand, one hundred nine".