1678344679 has 16 divisors (see below), whose sum is σ = 1906198560. Its totient is φ = 1464168960.

The previous prime is 1678344677. The next prime is 1678344697. The reversal of 1678344679 is 9764438761.

It is a cyclic number.

It is not a de Polignac number, because 1678344679 - 2¹ = 1678344677 is a prime.

It is a super-2 number, since 2×1678344679² = 5633681723055226082, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1678344671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1467 + ... + 57955.

It is an arithmetic number, because the mean of its divisors is an integer number (119137410).

Almost surely, 2^1678344679 is an apocalyptic number.

1678344679 is a deficient number, since it is larger than the sum of its proper divisors (227853881).

1678344679 is a wasteful number, since it uses less digits than its factorization.

1678344679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56610.

The product of its digits is 6096384, while the sum is 55.

The square root of 1678344679 is about 40967.6052387737. The cubic root of 1678344679 is about 1188.3938218176.

The spelling of 1678344679 in words is "one billion, six hundred seventy-eight million, three hundred forty-four thousand, six hundred seventy-nine".