340644677 has 2 divisors, whose sum is σ = 340644678. Its totient is φ = 340644676.

The previous prime is 340644649. The next prime is 340644721. The reversal of 340644677 is 776446043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275261281 + 65383396 = 16591^2 + 8086^2 .

It is an emirp because it is prime and its reverse (776446043) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-340644677 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (340644617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170322338 + 170322339.

It is an arithmetic number, because the mean of its divisors is an integer number (170322339).

Almost surely, 2^340644677 is an apocalyptic number.

It is an amenable number.

340644677 is a deficient number, since it is larger than the sum of its proper divisors (1).

340644677 is an equidigital number, since it uses as much as digits as its factorization.

340644677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 41.

The square root of 340644677 is about 18456.5618954344. The cubic root of 340644677 is about 698.3940579162.

The spelling of 340644677 in words is "three hundred forty million, six hundred forty-four thousand, six hundred seventy-seven".