385192109 has 4 divisors (see below), whose sum is σ = 401939616. Its totient is φ = 368444604.

The previous prime is 385192099. The next prime is 385192153. The reversal of 385192109 is 901291583.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 901291583 = 5897 ⋅152839.

It is a cyclic number.

It is not a de Polignac number, because 385192109 - 2⁸ = 385191853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (385192009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8373719 + ... + 8373764.

It is an arithmetic number, because the mean of its divisors is an integer number (100484904).

Almost surely, 2^385192109 is an apocalyptic number.

It is an amenable number.

385192109 is a deficient number, since it is larger than the sum of its proper divisors (16747507).

385192109 is a wasteful number, since it uses less digits than its factorization.

385192109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16747506.

The product of its (nonzero) digits is 19440, while the sum is 38.

The square root of 385192109 is about 19626.3116504350. The cubic root of 385192109 is about 727.5996149261.

The spelling of 385192109 in words is "three hundred eighty-five million, one hundred ninety-two thousand, one hundred nine".