1322780077 has 2 divisors, whose sum is σ = 1322780078. Its totient is φ = 1322780076.

The previous prime is 1322780051. The next prime is 1322780099. The reversal of 1322780077 is 7700872231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 794056041 + 528724036 = 28179^2 + 22994^2 .

It is a cyclic number.

It is not a de Polignac number, because 1322780077 - 2⁷ = 1322779949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1322780777) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 661390038 + 661390039.

It is an arithmetic number, because the mean of its divisors is an integer number (661390039).

Almost surely, 2^1322780077 is an apocalyptic number.

It is an amenable number.

1322780077 is a deficient number, since it is larger than the sum of its proper divisors (1).

1322780077 is an equidigital number, since it uses as much as digits as its factorization.

1322780077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32928, while the sum is 37.

The square root of 1322780077 is about 36370.0436760805. The cubic root of 1322780077 is about 1097.7308808008.

The spelling of 1322780077 in words is "one billion, three hundred twenty-two million, seven hundred eighty thousand, seventy-seven".