1320636073 has 2 divisors, whose sum is σ = 1320636074. Its totient is φ = 1320636072.

The previous prime is 1320636061. The next prime is 1320636089. The reversal of 1320636073 is 3706360231.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 771061824 + 549574249 = 27768^2 + 23443^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320636073 - 2¹⁷ = 1320505001 is a prime.

It is a super-2 number, since 2×1320636073² = 3488159274617722658, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1320636013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660318036 + 660318037.

It is an arithmetic number, because the mean of its divisors is an integer number (660318037).

Almost surely, 2^1320636073 is an apocalyptic number.

It is an amenable number.

1320636073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320636073 is an equidigital number, since it uses as much as digits as its factorization.

1320636073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 31.

The square root of 1320636073 is about 36340.5568614461. The cubic root of 1320636073 is about 1097.1374810487.

The spelling of 1320636073 in words is "one billion, three hundred twenty million, six hundred thirty-six thousand, seventy-three".