1220878067 has 2 divisors, whose sum is σ = 1220878068. Its totient is φ = 1220878066.

The previous prime is 1220878039. The next prime is 1220878081. The reversal of 1220878067 is 7608780221.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1220878067 - 2¹⁶ = 1220812531 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220878037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 610439033 + 610439034.

It is an arithmetic number, because the mean of its divisors is an integer number (610439034).

Almost surely, 2^1220878067 is an apocalyptic number.

1220878067 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220878067 is an equidigital number, since it uses as much as digits as its factorization.

1220878067 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75264, while the sum is 41.

The square root of 1220878067 is about 34941.0656248489. The cubic root of 1220878067 is about 1068.7860185893.

The spelling of 1220878067 in words is "one billion, two hundred twenty million, eight hundred seventy-eight thousand, sixty-seven".