340221493 has 6 divisors (see below), whose sum is σ = 361412066. Its totient is φ = 320208192.

The previous prime is 340221491. The next prime is 340221499. The reversal of 340221493 is 394122043.

It can be written as a sum of positive squares in 3 ways, for example, as 233264529 + 106956964 = 15273^2 + 10342^2 .

It is not a de Polignac number, because 340221493 - 2¹ = 340221491 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 (340221491) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 588330 + ... + 588907.

Almost surely, 2^340221493 is an apocalyptic number.

It is an amenable number.

340221493 is a deficient number, since it is larger than the sum of its proper divisors (21190573).

340221493 is a wasteful number, since it uses less digits than its factorization.

340221493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177271 (or 1177254 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 340221493 is about 18445.0940089770. The cubic root of 340221493 is about 698.1047323298.

The spelling of 340221493 in words is "three hundred forty million, two hundred twenty-one thousand, four hundred ninety-three".