279672649 has 2 divisors, whose sum is σ = 279672650. Its totient is φ = 279672648.

The previous prime is 279672611. The next prime is 279672667. The reversal of 279672649 is 946276972.

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., 272745225 + 6927424 = 16515^2 + 2632^2 .

It is a cyclic number.

It is not a de Polignac number, because 279672649 - 2²¹ = 277575497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 279672596 and 279672605.

It is not a weakly prime, because it can be changed into another prime (279672689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 139836324 + 139836325.

It is an arithmetic number, because the mean of its divisors is an integer number (139836325).

Almost surely, 2^279672649 is an apocalyptic number.

It is an amenable number.

279672649 is a deficient number, since it is larger than the sum of its proper divisors (1).

279672649 is an equidigital number, since it uses as much as digits as its factorization.

279672649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2286144, while the sum is 52.

The square root of 279672649 is about 16723.4161880879. The cubic root of 279672649 is about 653.9582133738.

The spelling of 279672649 in words is "two hundred seventy-nine million, six hundred seventy-two thousand, six hundred forty-nine".