1005865373 has 2 divisors, whose sum is σ = 1005865374. Its totient is φ = 1005865372.

The previous prime is 1005865337. The next prime is 1005865397. The reversal of 1005865373 is 3735685001.

Together with previous prime (1005865337) 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., 831572569 + 174292804 = 28837^2 + 13202^2 .

It is a cyclic number.

It is not a de Polignac number, because 1005865373 - 2⁸ = 1005865117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1005865303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 502932686 + 502932687.

It is an arithmetic number, because the mean of its divisors is an integer number (502932687).

Almost surely, 2^1005865373 is an apocalyptic number.

It is an amenable number.

1005865373 is a deficient number, since it is larger than the sum of its proper divisors (1).

1005865373 is an equidigital number, since it uses as much as digits as its factorization.

1005865373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 75600, while the sum is 38.

The square root of 1005865373 is about 31715.3807008524. The cubic root of 1005865373 is about 1001.9513142295.

The spelling of 1005865373 in words is "one billion, five million, eight hundred sixty-five thousand, three hundred seventy-three".