679846549 has 2 divisors, whose sum is σ = 679846550. Its totient is φ = 679846548.

The previous prime is 679846499. The next prime is 679846561. The reversal of 679846549 is 945648976.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 384865924 + 294980625 = 19618^2 + 17175^2 .

It is a cyclic number.

It is not a de Polignac number, because 679846549 - 2⁷ = 679846421 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 679846493 and 679846502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (679841549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339923274 + 339923275.

It is an arithmetic number, because the mean of its divisors is an integer number (339923275).

Almost surely, 2^679846549 is an apocalyptic number.

It is an amenable number.

679846549 is a deficient number, since it is larger than the sum of its proper divisors (1).

679846549 is an equidigital number, since it uses as much as digits as its factorization.

679846549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13063680, while the sum is 58.

The square root of 679846549 is about 26073.8671661877. The cubic root of 679846549 is about 879.2997826015.

The spelling of 679846549 in words is "six hundred seventy-nine million, eight hundred forty-six thousand, five hundred forty-nine".