678487797 has 12 divisors (see below), whose sum is σ = 1055425644. Its totient is φ = 417530880.

The previous prime is 678487781. The next prime is 678487837. The reversal of 678487797 is 797784876.

678487797 is a `hidden beast` number, since 67 + 8 + 487 + 7 + 97 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 337309956 + 341177841 = 18366^2 + 18471^2 .

It is not a de Polignac number, because 678487797 - 2⁴ = 678487781 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678487717) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2899404 + ... + 2899637.

It is an arithmetic number, because the mean of its divisors is an integer number (87952137).

Almost surely, 2^678487797 is an apocalyptic number.

It is an amenable number.

678487797 is a deficient number, since it is larger than the sum of its proper divisors (376937847).

678487797 is a wasteful number, since it uses less digits than its factorization.

678487797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5799060 (or 5799057 counting only the distinct ones).

The product of its digits is 33191424, while the sum is 63.

The square root of 678487797 is about 26047.7983138691. The cubic root of 678487797 is about 878.7135977857.

The spelling of 678487797 in words is "six hundred seventy-eight million, four hundred eighty-seven thousand, seven hundred ninety-seven".