395921939 has 4 divisors (see below), whose sum is σ = 452482224. Its totient is φ = 339361656.

The previous prime is 395921909. The next prime is 395921963. The reversal of 395921939 is 939129593.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 939129593 = 31 ⋅30294503.

It is a cyclic number.

It is not a de Polignac number, because 395921939 - 2¹⁶ = 395856403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395921909) 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, 28280132 + ... + 28280145.

It is an arithmetic number, because the mean of its divisors is an integer number (113120556).

Almost surely, 2^395921939 is an apocalyptic number.

395921939 is a deficient number, since it is larger than the sum of its proper divisors (56560285).

395921939 is an equidigital number, since it uses as much as digits as its factorization.

395921939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56560284.

The product of its digits is 590490, while the sum is 50.

The square root of 395921939 is about 19897.7872890430. The cubic root of 395921939 is about 734.2937909512.

The spelling of 395921939 in words is "three hundred ninety-five million, nine hundred twenty-one thousand, nine hundred thirty-nine".