340691 has 8 divisors (see below), whose sum is σ = 372960. Its totient is φ = 309312.

The previous prime is 340687. The next prime is 340693. The reversal of 340691 is 196043.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 340691 - 2² = 340687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 770 + ... + 1128.

It is an arithmetic number, because the mean of its divisors is an integer number (46620).

2³⁴⁰⁶⁹¹ is an apocalyptic number.

340691 is a deficient number, since it is larger than the sum of its proper divisors (32269).

340691 is a wasteful number, since it uses less digits than its factorization.

340691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 340691 is about 583.6874163454. The cubic root of 340691 is about 69.8425713816.

Subtracting from 340691 its product of nonzero digits (648), we obtain a palindrome (340043).

The spelling of 340691 in words is "three hundred forty thousand, six hundred ninety-one".