340390691 has 8 divisors (see below), whose sum is σ = 344432304. Its totient is φ = 336367360.

The previous prime is 340390679. The next prime is 340390703. The reversal of 340390691 is 196093043.

It is an interprime number because it is at equal distance from previous prime (340390679) and next prime (340390703).

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 340390691 - 2²² = 336196387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340390621) 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, 34871 + ... + 43551.

It is an arithmetic number, because the mean of its divisors is an integer number (43054038).

Almost surely, 2^340390691 is an apocalyptic number.

340390691 is a deficient number, since it is larger than the sum of its proper divisors (4041613).

340390691 is a wasteful number, since it uses less digits than its factorization.

340390691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9141.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 340390691 is about 18449.6799701241. The cubic root of 340390691 is about 698.2204396476.

The spelling of 340390691 in words is "three hundred forty million, three hundred ninety thousand, six hundred ninety-one".