1222455679 has 2 divisors, whose sum is σ = 1222455680. Its totient is φ = 1222455678.

The previous prime is 1222455667. The next prime is 1222455697. The reversal of 1222455679 is 9765542221.

Together with next prime (1222455697) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1222455679 - 2⁷ = 1222455551 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222455779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611227839 + 611227840.

It is an arithmetic number, because the mean of its divisors is an integer number (611227840).

Almost surely, 2^1222455679 is an apocalyptic number.

1222455679 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222455679 is an equidigital number, since it uses as much as digits as its factorization.

1222455679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 302400, while the sum is 43.

The square root of 1222455679 is about 34963.6336641374. The cubic root of 1222455679 is about 1069.2461802674.

The spelling of 1222455679 in words is "one billion, two hundred twenty-two million, four hundred fifty-five thousand, six hundred seventy-nine".