220770779 has 2 divisors, whose sum is σ = 220770780. Its totient is φ = 220770778.

The previous prime is 220770751. The next prime is 220770791. The reversal of 220770779 is 977077022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220770779 - 2⁸ = 220770523 is a prime.

It is not a weakly prime, because it can be changed into another prime (220770079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110385389 + 110385390.

It is an arithmetic number, because the mean of its divisors is an integer number (110385390).

Almost surely, 2^220770779 is an apocalyptic number.

220770779 is a deficient number, since it is larger than the sum of its proper divisors (1).

220770779 is an equidigital number, since it uses as much as digits as its factorization.

220770779 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86436, while the sum is 41.

The square root of 220770779 is about 14858.3572106744. The cubic root of 220770779 is about 604.3852590507.

The spelling of 220770779 in words is "two hundred twenty million, seven hundred seventy thousand, seven hundred seventy-nine".