1320454537 has 2 divisors, whose sum is σ = 1320454538. Its totient is φ = 1320454536.

The previous prime is 1320454337. The next prime is 1320454543. The reversal of 1320454537 is 7354540231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1027907721 + 292546816 = 32061^2 + 17104^2 .

It is an emirp because it is prime and its reverse (7354540231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1320454537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1320454567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660227268 + 660227269.

It is an arithmetic number, because the mean of its divisors is an integer number (660227269).

Almost surely, 2^1320454537 is an apocalyptic number.

It is an amenable number.

1320454537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1320454537 is an equidigital number, since it uses as much as digits as its factorization.

1320454537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 34.

The square root of 1320454537 is about 36338.0590703466. The cubic root of 1320454537 is about 1097.0872075276.

Adding to 1320454537 its reverse (7354540231), we get a palindrome (8674994768).

The spelling of 1320454537 in words is "one billion, three hundred twenty million, four hundred fifty-four thousand, five hundred thirty-seven".