340689393 has 24 divisors (see below), whose sum is σ = 539572800. Its totient is φ = 205428960.

The previous prime is 340689379. The next prime is 340689407. The reversal of 340689393 is 393986043.

It is an interprime number because it is at equal distance from previous prime (340689379) and next prime (340689407).

It is not a de Polignac number, because 340689393 - 2¹² = 340685297 is a prime.

It is not an unprimeable number, because it can be changed into a prime (340689313) 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 23 ways as a sum of consecutive naturals, for example, 11055 + ... + 28347.

It is an arithmetic number, because the mean of its divisors is an integer number (22482200).

Almost surely, 2^340689393 is an apocalyptic number.

340689393 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

340689393 is a deficient number, since it is larger than the sum of its proper divisors (198883407).

340689393 is a wasteful number, since it uses less digits than its factorization.

340689393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17509 (or 17506 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 45.

The square root of 340689393 is about 18457.7732405618. The cubic root of 340689393 is about 698.4246156835.

The spelling of 340689393 in words is "three hundred forty million, six hundred eighty-nine thousand, three hundred ninety-three".