678133747 has 2 divisors, whose sum is σ = 678133748. Its totient is φ = 678133746.

The previous prime is 678133699. The next prime is 678133751. The reversal of 678133747 is 747331876.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-678133747 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 678133697 and 678133706.

It is not a weakly prime, because it can be changed into another prime (678133847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339066873 + 339066874.

It is an arithmetic number, because the mean of its divisors is an integer number (339066874).

Almost surely, 2^678133747 is an apocalyptic number.

678133747 is a deficient number, since it is larger than the sum of its proper divisors (1).

678133747 is an equidigital number, since it uses as much as digits as its factorization.

678133747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 592704, while the sum is 46.

The square root of 678133747 is about 26041.0012672324. The cubic root of 678133747 is about 878.5607271024.

The spelling of 678133747 in words is "six hundred seventy-eight million, one hundred thirty-three thousand, seven hundred forty-seven".