678263741 has 2 divisors, whose sum is σ = 678263742. Its totient is φ = 678263740.

The previous prime is 678263717. The next prime is 678263753. The reversal of 678263741 is 147362876.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 502701241 + 175562500 = 22421^2 + 13250^2 .

It is a cyclic number.

It is not a de Polignac number, because 678263741 - 2²² = 674069437 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 678263692 and 678263701.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (678263771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339131870 + 339131871.

It is an arithmetic number, because the mean of its divisors is an integer number (339131871).

Almost surely, 2^678263741 is an apocalyptic number.

It is an amenable number.

678263741 is a deficient number, since it is larger than the sum of its proper divisors (1).

678263741 is an equidigital number, since it uses as much as digits as its factorization.

678263741 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 44.

The square root of 678263741 is about 26043.4970962043. The cubic root of 678263741 is about 878.6168617154.

The spelling of 678263741 in words is "six hundred seventy-eight million, two hundred sixty-three thousand, seven hundred forty-one".