Search a number
-
+
17421109 is a prime number
BaseRepresentation
bin100001001110…
…1001100110101
31012210002021021
41002131030311
513424433414
61421221141
7301035256
oct102351465
935702237
1017421109
119919812
125a017b1
1337bc664
142456b2d
1517e1c24
hex109d335

17421109 has 2 divisors, whose sum is σ = 17421110. Its totient is φ = 17421108.

The previous prime is 17421077. The next prime is 17421113. The reversal of 17421109 is 90112471.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13727025 + 3694084 = 3705^2 + 1922^2 .

It is an emirp because it is prime and its reverse (90112471) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 17421109 - 25 = 17421077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (17421169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8710554 + 8710555.

It is an arithmetic number, because the mean of its divisors is an integer number (8710555).

Almost surely, 217421109 is an apocalyptic number.

It is an amenable number.

17421109 is a deficient number, since it is larger than the sum of its proper divisors (1).

17421109 is an equidigital number, since it uses as much as digits as its factorization.

17421109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 17421109 is about 4173.8602036963. The cubic root of 17421109 is about 259.2339830352.

The spelling of 17421109 in words is "seventeen million, four hundred twenty-one thousand, one hundred nine".