640003093 has 2 divisors, whose sum is σ = 640003094. Its totient is φ = 640003092.

The previous prime is 640003079. The next prime is 640003141. The reversal of 640003093 is 390300046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 525234724 + 114768369 = 22918^2 + 10713^2 .

It is a cyclic number.

It is not a de Polignac number, because 640003093 - 2²⁹ = 103132181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (640003003) 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 as a sum of consecutive naturals, namely, 320001546 + 320001547.

It is an arithmetic number, because the mean of its divisors is an integer number (320001547).

Almost surely, 2^640003093 is an apocalyptic number.

It is an amenable number.

640003093 is a deficient number, since it is larger than the sum of its proper divisors (1).

640003093 is an equidigital number, since it uses as much as digits as its factorization.

640003093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 640003093 is about 25298.2824120532. The cubic root of 640003093 is about 861.7752642744.

The spelling of 640003093 in words is "six hundred forty million, three thousand, ninety-three".