678950139 has 8 divisors (see below), whose sum is σ = 1034590720. Its totient is φ = 387971496.

The previous prime is 678950113. The next prime is 678950141. The reversal of 678950139 is 931059876.

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

It is not a de Polignac number, because 678950139 - 2⁷ = 678950011 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678950149) 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, 16165459 + ... + 16165500.

It is an arithmetic number, because the mean of its divisors is an integer number (129323840).

Almost surely, 2^678950139 is an apocalyptic number.

678950139 is a deficient number, since it is larger than the sum of its proper divisors (355640581).

678950139 is a wasteful number, since it uses less digits than its factorization.

678950139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32330969.

The product of its (nonzero) digits is 408240, while the sum is 48.

The square root of 678950139 is about 26056.6716792456. The cubic root of 678950139 is about 878.9131464282.

The spelling of 678950139 in words is "six hundred seventy-eight million, nine hundred fifty thousand, one hundred thirty-nine".