678973389 has 8 divisors (see below), whose sum is σ = 905427072. Its totient is φ = 452584320.

The previous prime is 678973381. The next prime is 678973391. The reversal of 678973389 is 983379876.

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

It is not a de Polignac number, because 678973389 - 2³ = 678973381 is a prime.

It is a super-2 number, since 2×678973389² = 922009725940290642, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678973381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19804 + ... + 41834.

It is an arithmetic number, because the mean of its divisors is an integer number (113178384).

Almost surely, 2^678973389 is an apocalyptic number.

It is an amenable number.

678973389 is a deficient number, since it is larger than the sum of its proper divisors (226453683).

678973389 is a wasteful number, since it uses less digits than its factorization.

678973389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32307.

The product of its digits is 13716864, while the sum is 60.

The square root of 678973389 is about 26057.1178183620. The cubic root of 678973389 is about 878.9231788279.

The spelling of 678973389 in words is "six hundred seventy-eight million, nine hundred seventy-three thousand, three hundred eighty-nine".