50173309 has 2 divisors, whose sum is σ = 50173310. Its totient is φ = 50173308.

The previous prime is 50173289. The next prime is 50173337. The reversal of 50173309 is 90337105.

50173309 = T₅₇₈₂ + T₅₇₈₃ + T₅₇₈₄.

It is an a-pointer prime, because the next prime (50173337) can be obtained adding 50173309 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46922500 + 3250809 = 6850^2 + 1803^2 .

It is a cyclic number.

It is not a de Polignac number, because 50173309 - 2⁷ = 50173181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (50173379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25086654 + 25086655.

It is an arithmetic number, because the mean of its divisors is an integer number (25086655).

Almost surely, 2^50173309 is an apocalyptic number.

50173309 is the 5784-th centered triangular number.

It is an amenable number.

50173309 is a deficient number, since it is larger than the sum of its proper divisors (1).

50173309 is an equidigital number, since it uses as much as digits as its factorization.

50173309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2835, while the sum is 28.

The square root of 50173309 is about 7083.3120078110. The cubic root of 50173309 is about 368.8283095584.

The spelling of 50173309 in words is "fifty million, one hundred seventy-three thousand, three hundred nine".