222456779 has 2 divisors, whose sum is σ = 222456780. Its totient is φ = 222456778.

The previous prime is 222456757. The next prime is 222456797. The reversal of 222456779 is 977654222.

Together with next prime (222456797) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 222456779 - 2⁸ = 222456523 is a prime.

It is a Sophie Germain prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (222456719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111228389 + 111228390.

It is an arithmetic number, because the mean of its divisors is an integer number (111228390).

Almost surely, 2^222456779 is an apocalyptic number.

222456779 is a deficient number, since it is larger than the sum of its proper divisors (1).

222456779 is an equidigital number, since it uses as much as digits as its factorization.

222456779 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 44.

The square root of 222456779 is about 14914.9850486013. The cubic root of 222456779 is about 605.9198983176.

The spelling of 222456779 in words is "two hundred twenty-two million, four hundred fifty-six thousand, seven hundred seventy-nine".