1320937873 has 2 divisors, whose sum is σ = 1320937874. Its totient is φ = 1320937872.

The previous prime is 1320937837. The next prime is 1320937879. The reversal of 1320937873 is 3787390231.

Together with previous prime (1320937837) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1278205504 + 42732369 = 35752^2 + 6537^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320937873 - 2¹³ = 1320929681 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320937879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660468936 + 660468937.

It is an arithmetic number, because the mean of its divisors is an integer number (660468937).

Almost surely, 2^1320937873 is an apocalyptic number.

It is an amenable number.

1320937873 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320937873 is an equidigital number, since it uses as much as digits as its factorization.

1320937873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 190512, while the sum is 43.

The square root of 1320937873 is about 36344.7090097032. The cubic root of 1320937873 is about 1097.2210495853.

The spelling of 1320937873 in words is "one billion, three hundred twenty million, nine hundred thirty-seven thousand, eight hundred seventy-three".