393848081 has 4 divisors (see below), whose sum is σ = 429652464. Its totient is φ = 358043700.

The previous prime is 393848057. The next prime is 393848111. The reversal of 393848081 is 180848393.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-393848081 is a prime.

It is a super-2 number, since 2×393848081² = 310232621814765122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393848041) 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, 17902175 + ... + 17902196.

It is an arithmetic number, because the mean of its divisors is an integer number (107413116).

Almost surely, 2^393848081 is an apocalyptic number.

It is an amenable number.

393848081 is a deficient number, since it is larger than the sum of its proper divisors (35804383).

393848081 is a wasteful number, since it uses less digits than its factorization.

393848081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35804382.

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 393848081 is about 19845.6060879984. The cubic root of 393848081 is about 733.0094572340.

The spelling of 393848081 in words is "three hundred ninety-three million, eight hundred forty-eight thousand, eighty-one".