1331303173 has 2 divisors, whose sum is σ = 1331303174. Its totient is φ = 1331303172.

The previous prime is 1331303161. The next prime is 1331303213. The reversal of 1331303173 is 3713031331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1100779684 + 230523489 = 33178^2 + 15183^2 .

It is an emirp because it is prime and its reverse (3713031331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1331303173 - 2¹³ = 1331294981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1331306173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665651586 + 665651587.

It is an arithmetic number, because the mean of its divisors is an integer number (665651587).

Almost surely, 2^1331303173 is an apocalyptic number.

It is an amenable number.

1331303173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331303173 is an equidigital number, since it uses as much as digits as its factorization.

1331303173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1701, while the sum is 25.

The square root of 1331303173 is about 36487.0274618254. The cubic root of 1331303173 is about 1100.0835123923.

The spelling of 1331303173 in words is "one billion, three hundred thirty-one million, three hundred three thousand, one hundred seventy-three".