1331512073 has 2 divisors, whose sum is σ = 1331512074. Its totient is φ = 1331512072.

The previous prime is 1331512051. The next prime is 1331512123. The reversal of 1331512073 is 3702151331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 745726864 + 585785209 = 27308^2 + 24203^2 .

It is an emirp because it is prime and its reverse (3702151331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1331512073 - 2⁶ = 1331512009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331512033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665756036 + 665756037.

It is an arithmetic number, because the mean of its divisors is an integer number (665756037).

Almost surely, 2^1331512073 is an apocalyptic number.

It is an amenable number.

1331512073 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331512073 is an equidigital number, since it uses as much as digits as its factorization.

1331512073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1890, while the sum is 26.

The square root of 1331512073 is about 36489.8900107961. The cubic root of 1331512073 is about 1100.1410488552.

The spelling of 1331512073 in words is "one billion, three hundred thirty-one million, five hundred twelve thousand, seventy-three".