340279649 has 4 divisors (see below), whose sum is σ = 352013460. Its totient is φ = 328545840.

The previous prime is 340279637. The next prime is 340279669. The reversal of 340279649 is 946972043.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 946972043 = 37 ⋅25593839.

It can be written as a sum of positive squares in 2 ways, for example, as 102657424 + 237622225 = 10132^2 + 15415^2 .

It is a cyclic number.

It is not a de Polignac number, because 340279649 - 2⁸ = 340279393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (340279669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5866862 + ... + 5866919.

It is an arithmetic number, because the mean of its divisors is an integer number (88003365).

Almost surely, 2^340279649 is an apocalyptic number.

It is an amenable number.

340279649 is a deficient number, since it is larger than the sum of its proper divisors (11733811).

340279649 is a wasteful number, since it uses less digits than its factorization.

340279649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11733810.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 340279649 is about 18446.6704041678. The cubic root of 340279649 is about 698.1445070713.

The spelling of 340279649 in words is "three hundred forty million, two hundred seventy-nine thousand, six hundred forty-nine".