395971693 has 6 divisors (see below), whose sum is σ = 426508334. Its totient is φ = 365446104.

The previous prime is 395971687. The next prime is 395971699. The reversal of 395971693 is 396179593.

It is an interprime number because it is at equal distance from previous prime (395971687) and next prime (395971699).

It can be written as a sum of positive squares in only one way, i.e., 274134249 + 121837444 = 16557^2 + 11038^2 .

It is not a de Polignac number, because 395971693 - 2⁵ = 395971661 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 395971693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395971699) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 68988 + ... + 74506.

Almost surely, 2^395971693 is an apocalyptic number.

It is an amenable number.

395971693 is a deficient number, since it is larger than the sum of its proper divisors (30536641).

395971693 is an frugal number, since it uses more digits than its factorization.

395971693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11051 (or 5532 counting only the distinct ones).

The product of its digits is 1377810, while the sum is 52.

The square root of 395971693 is about 19899.0374892858. The cubic root of 395971693 is about 734.3245482962.

Multiplying 395971693 by its sum of digits (52), we get a square (20590528036 = 143494²).

The spelling of 395971693 in words is "three hundred ninety-five million, nine hundred seventy-one thousand, six hundred ninety-three".