1320761437 has 2 divisors, whose sum is σ = 1320761438. Its totient is φ = 1320761436.

The previous prime is 1320761411. The next prime is 1320761473. The reversal of 1320761437 is 7341670231.

Together with next prime (1320761473) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1030024836 + 290736601 = 32094^2 + 17051^2 .

It is a cyclic number.

It is not a de Polignac number, because 1320761437 - 2¹¹ = 1320759389 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320761837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660380718 + 660380719.

It is an arithmetic number, because the mean of its divisors is an integer number (660380719).

Almost surely, 2^1320761437 is an apocalyptic number.

It is an amenable number.

1320761437 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320761437 is an equidigital number, since it uses as much as digits as its factorization.

1320761437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 34.

The square root of 1320761437 is about 36342.2816702529. The cubic root of 1320761437 is about 1097.1721959345.

The spelling of 1320761437 in words is "one billion, three hundred twenty million, seven hundred sixty-one thousand, four hundred thirty-seven".