393868149 has 8 divisors (see below), whose sum is σ = 525388512. Its totient is φ = 262463280.

The previous prime is 393868141. The next prime is 393868151. The reversal of 393868149 is 941868393.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 393868149 - 2³ = 393868141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393868141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20574 + ... + 34799.

It is an arithmetic number, because the mean of its divisors is an integer number (65673564).

Almost surely, 2^393868149 is an apocalyptic number.

It is an amenable number.

393868149 is a deficient number, since it is larger than the sum of its proper divisors (131520363).

393868149 is a wasteful number, since it uses less digits than its factorization.

393868149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57747.

The product of its digits is 1119744, while the sum is 51.

The square root of 393868149 is about 19846.1116846600. Note that the first 3 decimals coincide. The cubic root of 393868149 is about 733.0219068600.

The spelling of 393868149 in words is "three hundred ninety-three million, eight hundred sixty-eight thousand, one hundred forty-nine".