678451 has 2 divisors, whose sum is σ = 678452. Its totient is φ = 678450.

The previous prime is 678437. The next prime is 678463. The reversal of 678451 is 154876.

678451 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678451 - 2¹⁵ = 645683 is a prime.

It is not a weakly prime, because it can be changed into another prime (678401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339225 + 339226.

It is an arithmetic number, because the mean of its divisors is an integer number (339226).

2⁶⁷⁸⁴⁵¹ is an apocalyptic number.

678451 is a deficient number, since it is larger than the sum of its proper divisors (1).

678451 is an equidigital number, since it uses as much as digits as its factorization.

678451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6720, while the sum is 31.

The square root of 678451 is about 823.6813704340. The cubic root of 678451 is about 87.8697712160.

The spelling of 678451 in words is "six hundred seventy-eight thousand, four hundred fifty-one".