340978653 has 10 divisors (see below), whose sum is σ = 509363294. Its totient is φ = 227319048.

The previous prime is 340978633. The next prime is 340978663. The reversal of 340978653 is 356879043.

It can be written as a sum of positive squares in only one way, i.e., 336428964 + 4549689 = 18342^2 + 2133^2 .

It is not a de Polignac number, because 340978653 - 2⁵ = 340978621 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 340978599 and 340978608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (340978633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2104726 + ... + 2104887.

Almost surely, 2^340978653 is an apocalyptic number.

It is an amenable number.

340978653 is a deficient number, since it is larger than the sum of its proper divisors (168384641).

340978653 is an equidigital number, since it uses as much as digits as its factorization.

340978653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4209625 (or 4209616 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 45.

The square root of 340978653 is about 18465.6073011423. The cubic root of 340978653 is about 698.6222239831.

The spelling of 340978653 in words is "three hundred forty million, nine hundred seventy-eight thousand, six hundred fifty-three".