260399779 has 2 divisors, whose sum is σ = 260399780. Its totient is φ = 260399778.

The previous prime is 260399753. The next prime is 260399791. The reversal of 260399779 is 977993062.

260399779 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 260399779 - 2¹³ = 260391587 is a prime.

It is not a weakly prime, because it can be changed into another prime (260399479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130199889 + 130199890.

It is an arithmetic number, because the mean of its divisors is an integer number (130199890).

Almost surely, 2^260399779 is an apocalyptic number.

260399779 is a deficient number, since it is larger than the sum of its proper divisors (1).

260399779 is an equidigital number, since it uses as much as digits as its factorization.

260399779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1285956, while the sum is 52.

The square root of 260399779 is about 16136.9073555003. The cubic root of 260399779 is about 638.5773894394.

The spelling of 260399779 in words is "two hundred sixty million, three hundred ninety-nine thousand, seven hundred seventy-nine".