678675079 has 4 divisors (see below), whose sum is σ = 714394840. Its totient is φ = 642955320.

The previous prime is 678675061. The next prime is 678675103. The reversal of 678675079 is 970576876.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 678675079 - 2⁷ = 678674951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678675059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17859852 + ... + 17859889.

It is an arithmetic number, because the mean of its divisors is an integer number (178598710).

Almost surely, 2^678675079 is an apocalyptic number.

678675079 is a deficient number, since it is larger than the sum of its proper divisors (35719761).

678675079 is a wasteful number, since it uses less digits than its factorization.

678675079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35719760.

The product of its (nonzero) digits is 4445280, while the sum is 55.

The square root of 678675079 is about 26051.3930337708. The cubic root of 678675079 is about 878.7944403601.

The spelling of 678675079 in words is "six hundred seventy-eight million, six hundred seventy-five thousand, seventy-nine".