1206641173 has 4 divisors (see below), whose sum is σ = 1206805600. Its totient is φ = 1206476748.

The previous prime is 1206641171. The next prime is 1206641201. The reversal of 1206641173 is 3711466021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3711466021 = 7489 ⋅495589.

It is a cyclic number.

It is not a de Polignac number, because 1206641173 - 2¹ = 1206641171 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1206641171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70665 + ... + 86062.

It is an arithmetic number, because the mean of its divisors is an integer number (301701400).

Almost surely, 2^1206641173 is an apocalyptic number.

It is an amenable number.

1206641173 is a deficient number, since it is larger than the sum of its proper divisors (164427).

1206641173 is an equidigital number, since it uses as much as digits as its factorization.

1206641173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164426.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 1206641173 is about 34736.7409668783. The cubic root of 1206641173 is about 1064.6153247891.

The spelling of 1206641173 in words is "one billion, two hundred six million, six hundred forty-one thousand, one hundred seventy-three".