1001009173 has 2 divisors, whose sum is σ = 1001009174. Its totient is φ = 1001009172.

The previous prime is 1001009161. The next prime is 1001009201. The reversal of 1001009173 is 3719001001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 655718449 + 345290724 = 25607^2 + 18582^2 .

It is a cyclic number.

It is not a de Polignac number, because 1001009173 - 2⁹ = 1001008661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1001009123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 500504586 + 500504587.

It is an arithmetic number, because the mean of its divisors is an integer number (500504587).

Almost surely, 2^1001009173 is an apocalyptic number.

It is an amenable number.

1001009173 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001009173 is an equidigital number, since it uses as much as digits as its factorization.

1001009173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189, while the sum is 22.

The square root of 1001009173 is about 31638.7290041809. The cubic root of 1001009173 is about 1000.3362779045.

The spelling of 1001009173 in words is "one billion, one million, nine thousand, one hundred seventy-three".