678490043 has 16 divisors (see below), whose sum is σ = 895670784. Its totient is φ = 497592960.

The previous prime is 678490037. The next prime is 678490049. The reversal of 678490043 is 340094876.

It is an interprime number because it is at equal distance from previous prime (678490037) and next prime (678490049).

It is a cyclic number.

It is not a de Polignac number, because 678490043 - 2⁴ = 678490027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (678490049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257855 + ... + 260472.

It is an arithmetic number, because the mean of its divisors is an integer number (55979424).

Almost surely, 2^678490043 is an apocalyptic number.

678490043 is a deficient number, since it is larger than the sum of its proper divisors (217180741).

678490043 is a wasteful number, since it uses less digits than its factorization.

678490043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518362.

The product of its (nonzero) digits is 145152, while the sum is 41.

The square root of 678490043 is about 26047.8414268822. The cubic root of 678490043 is about 878.7145673873.

The spelling of 678490043 in words is "six hundred seventy-eight million, four hundred ninety thousand, forty-three".