395354921 has 4 divisors (see below), whose sum is σ = 425766852. Its totient is φ = 364942992.

The previous prime is 395354899. The next prime is 395354977. The reversal of 395354921 is 129453593.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18800896 + 376554025 = 4336^2 + 19405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-395354921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (395384921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15205946 + ... + 15205971.

It is an arithmetic number, because the mean of its divisors is an integer number (106441713).

Almost surely, 2^395354921 is an apocalyptic number.

It is an amenable number.

395354921 is a deficient number, since it is larger than the sum of its proper divisors (30411931).

395354921 is a wasteful number, since it uses less digits than its factorization.

395354921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30411930.

The product of its digits is 145800, while the sum is 41.

The square root of 395354921 is about 19883.5339162836. The cubic root of 395354921 is about 733.9430848518.

The spelling of 395354921 in words is "three hundred ninety-five million, three hundred fifty-four thousand, nine hundred twenty-one".