395751661 has 8 divisors (see below), whose sum is σ = 418920480. Its totient is φ = 373217712.

The previous prime is 395751659. The next prime is 395751677. The reversal of 395751661 is 166157593.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 395751661 - 2¹ = 395751659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (395751061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157435 + ... + 159928.

It is an arithmetic number, because the mean of its divisors is an integer number (52365060).

Almost surely, 2^395751661 is an apocalyptic number.

It is an amenable number.

395751661 is a deficient number, since it is larger than the sum of its proper divisors (23168819).

395751661 is a wasteful number, since it uses less digits than its factorization.

395751661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317435.

The product of its digits is 170100, while the sum is 43.

The square root of 395751661 is about 19893.5080114091. The cubic root of 395751661 is about 734.1885075650.

The spelling of 395751661 in words is "three hundred ninety-five million, seven hundred fifty-one thousand, six hundred sixty-one".