260779979 has 2 divisors, whose sum is σ = 260779980. Its totient is φ = 260779978.

The previous prime is 260779927. The next prime is 260780011. The reversal of 260779979 is 979977062.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 260779979 - 2¹² = 260775883 is a prime.

It is not a weakly prime, because it can be changed into another prime (260779279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130389989 + 130389990.

It is an arithmetic number, because the mean of its divisors is an integer number (130389990).

Almost surely, 2^260779979 is an apocalyptic number.

260779979 is a deficient number, since it is larger than the sum of its proper divisors (1).

260779979 is an equidigital number, since it uses as much as digits as its factorization.

260779979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3000564, while the sum is 56.

The square root of 260779979 is about 16148.6835067135. The cubic root of 260779979 is about 638.8880259777. Note that the first 3 decimals are identical.

The spelling of 260779979 in words is "two hundred sixty million, seven hundred seventy-nine thousand, nine hundred seventy-nine".