1678448251 has 2 divisors, whose sum is σ = 1678448252. Its totient is φ = 1678448250.

The previous prime is 1678448227. The next prime is 1678448263. The reversal of 1678448251 is 1528448761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1678448251 - 2¹³ = 1678440059 is a prime.

It is not a weakly prime, because it can be changed into another prime (1678449251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839224125 + 839224126.

It is an arithmetic number, because the mean of its divisors is an integer number (839224126).

Almost surely, 2^1678448251 is an apocalyptic number.

1678448251 is a deficient number, since it is larger than the sum of its proper divisors (1).

1678448251 is an equidigital number, since it uses as much as digits as its factorization.

1678448251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 430080, while the sum is 46.

The square root of 1678448251 is about 40968.8692912070. The cubic root of 1678448251 is about 1188.4182668943.

The spelling of 1678448251 in words is "one billion, six hundred seventy-eight million, four hundred forty-eight thousand, two hundred fifty-one".