395172983 has 2 divisors, whose sum is σ = 395172984. Its totient is φ = 395172982.

The previous prime is 395172979. The next prime is 395172989. The reversal of 395172983 is 389271593.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 395172983 - 2² = 395172979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (395172989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 197586491 + 197586492.

It is an arithmetic number, because the mean of its divisors is an integer number (197586492).

Almost surely, 2^395172983 is an apocalyptic number.

395172983 is a deficient number, since it is larger than the sum of its proper divisors (1).

395172983 is an equidigital number, since it uses as much as digits as its factorization.

395172983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 408240, while the sum is 47.

The square root of 395172983 is about 19878.9582976573. The cubic root of 395172983 is about 733.8304833904.

The spelling of 395172983 in words is "three hundred ninety-five million, one hundred seventy-two thousand, nine hundred eighty-three".