1679447477 has 2 divisors, whose sum is σ = 1679447478. Its totient is φ = 1679447476.

The previous prime is 1679447467. The next prime is 1679447513. The reversal of 1679447477 is 7747449761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1678213156 + 1234321 = 40966^2 + 1111^2 .

It is a cyclic number.

It is not a de Polignac number, because 1679447477 - 2⁴ = 1679447461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1679447437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839723738 + 839723739.

It is an arithmetic number, because the mean of its divisors is an integer number (839723739).

Almost surely, 2^1679447477 is an apocalyptic number.

It is an amenable number.

1679447477 is a deficient number, since it is larger than the sum of its proper divisors (1).

1679447477 is an equidigital number, since it uses as much as digits as its factorization.

1679447477 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8297856, while the sum is 56.

The square root of 1679447477 is about 40981.0624191223. The cubic root of 1679447477 is about 1188.6540527078.

The spelling of 1679447477 in words is "one billion, six hundred seventy-nine million, four hundred forty-seven thousand, four hundred seventy-seven".