1306400173 has 8 divisors (see below), whose sum is σ = 1489651128. Its totient is φ = 1134971904.

The previous prime is 1306400167. The next prime is 1306400239. The reversal of 1306400173 is 3710046031.

It can be written as a sum of positive squares in 4 ways, for example, as 523631689 + 782768484 = 22883^2 + 27978^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1306400173 - 2⁵ = 1306400141 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 (1306400113) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2955436 + ... + 2955877.

It is an arithmetic number, because the mean of its divisors is an integer number (186206391).

Almost surely, 2^1306400173 is an apocalyptic number.

1306400173 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1306400173 is a deficient number, since it is larger than the sum of its proper divisors (183250955).

1306400173 is a wasteful number, since it uses less digits than its factorization.

1306400173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5911343.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 1306400173 is about 36144.1582140185. The cubic root of 1306400173 is about 1093.1810039507.

The spelling of 1306400173 in words is "one billion, three hundred six million, four hundred thousand, one hundred seventy-three".