678971049 has 8 divisors (see below), whose sum is σ = 906487392. Its totient is φ = 452051040.

The previous prime is 678971011. The next prime is 678971081. The reversal of 678971049 is 940179876.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 678971049 - 2⁷ = 678970921 is a prime.

It is a super-2 number, since 2×678971049² = 922003370760320802, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 678970992 and 678971010.

It is not an unprimeable number, because it can be changed into a prime (678971089) 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 7 ways as a sum of consecutive naturals, for example, 146419 + ... + 150984.

It is an arithmetic number, because the mean of its divisors is an integer number (113310924).

Almost surely, 2^678971049 is an apocalyptic number.

It is an amenable number.

678971049 is a deficient number, since it is larger than the sum of its proper divisors (227516343).

678971049 is a wasteful number, since it uses less digits than its factorization.

678971049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298167.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 678971049 is about 26057.0729169644. The cubic root of 678971049 is about 878.9221691257.

The spelling of 678971049 in words is "six hundred seventy-eight million, nine hundred seventy-one thousand, forty-nine".