385670091 has 4 divisors (see below), whose sum is σ = 514226792. Its totient is φ = 257113392.

The previous prime is 385670081. The next prime is 385670093. The reversal of 385670091 is 190076583.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 385670091 - 2¹⁵ = 385637323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (385670093) 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, 64278346 + ... + 64278351.

It is an arithmetic number, because the mean of its divisors is an integer number (128556698).

Almost surely, 2^385670091 is an apocalyptic number.

385670091 is a deficient number, since it is larger than the sum of its proper divisors (128556701).

385670091 is a wasteful number, since it uses less digits than its factorization.

385670091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128556700.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 385670091 is about 19638.4849466551. The cubic root of 385670091 is about 727.9004481621.

The spelling of 385670091 in words is "three hundred eighty-five million, six hundred seventy thousand, ninety-one".