678412477 has 2 divisors, whose sum is σ = 678412478. Its totient is φ = 678412476.

The previous prime is 678412417. The next prime is 678412507. The reversal of 678412477 is 774214876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 672157476 + 6255001 = 25926^2 + 2501^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678412477 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678412417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339206238 + 339206239.

It is an arithmetic number, because the mean of its divisors is an integer number (339206239).

Almost surely, 2^678412477 is an apocalyptic number.

It is an amenable number.

678412477 is a deficient number, since it is larger than the sum of its proper divisors (1).

678412477 is an equidigital number, since it uses as much as digits as its factorization.

678412477 is an evil number, because the sum of its binary digits is even.

The product of its digits is 526848, while the sum is 46.

The square root of 678412477 is about 26046.3524701636. The cubic root of 678412477 is about 878.6810807885.

The spelling of 678412477 in words is "six hundred seventy-eight million, four hundred twelve thousand, four hundred seventy-seven".