259628779 has 2 divisors, whose sum is σ = 259628780. Its totient is φ = 259628778.

The previous prime is 259628773. The next prime is 259628791. The reversal of 259628779 is 977826952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 259628779 - 2³ = 259628771 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (259628771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129814389 + 129814390.

It is an arithmetic number, because the mean of its divisors is an integer number (129814390).

Almost surely, 2^259628779 is an apocalyptic number.

259628779 is a deficient number, since it is larger than the sum of its proper divisors (1).

259628779 is an equidigital number, since it uses as much as digits as its factorization.

259628779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 55.

The square root of 259628779 is about 16113.0003103084. Note that the first 3 decimals coincide. The cubic root of 259628779 is about 637.9465262782.

It can be divided in two parts, 2596 and 28779, that added together give a triangular number (31375 = T₂₅₀).

The spelling of 259628779 in words is "two hundred fifty-nine million, six hundred twenty-eight thousand, seven hundred seventy-nine".