400000093 has 4 divisors (see below), whose sum is σ = 400331068. Its totient is φ = 399669120.

The previous prime is 400000091. The next prime is 400000109. The reversal of 400000093 is 390000004.

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 14152644 + 385847449 = 3762^2 + 19643^2 .

It is a cyclic number.

It is not a de Polignac number, because 400000093 - 2¹ = 400000091 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400000091) 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 3 ways as a sum of consecutive naturals, for example, 163668 + ... + 166093.

It is an arithmetic number, because the mean of its divisors is an integer number (100082767).

Almost surely, 2^400000093 is an apocalyptic number.

It is an amenable number.

400000093 is a deficient number, since it is larger than the sum of its proper divisors (330975).

400000093 is a wasteful number, since it uses less digits than its factorization.

400000093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330974.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 400000093 is about 20000.0023249999. The cubic root of 400000093 is about 736.8063568306.

Adding to 400000093 its reverse (390000004), we get a palindrome (790000097).

The spelling of 400000093 in words is "four hundred million, ninety-three", and thus it is an aban number.