Search a number
-
+
14999981 is a prime number
BaseRepresentation
bin111001001110…
…000110101101
31001020002002212
4321032012231
512314444411
61253300205
7241332503
oct71160655
931202085
1014999981
118515787
125034665
133152639
141dc6673
1514b468b
hexe4e1ad

14999981 has 2 divisors, whose sum is σ = 14999982. Its totient is φ = 14999980.

The previous prime is 14999977. The next prime is 15000017. The reversal of 14999981 is 18999941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8213956 + 6786025 = 2866^2 + 2605^2 .

It is a cyclic number.

It is not a de Polignac number, because 14999981 - 22 = 14999977 is a prime.

It is a super-2 number, since 2×149999812 = 449998860000722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14999921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7499990 + 7499991.

It is an arithmetic number, because the mean of its divisors is an integer number (7499991).

Almost surely, 214999981 is an apocalyptic number.

It is an amenable number.

14999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

14999981 is an equidigital number, since it uses as much as digits as its factorization.

14999981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 209952, while the sum is 50.

The square root of 14999981 is about 3872.9808933172. The cubic root of 14999981 is about 246.6211033040.

The spelling of 14999981 in words is "fourteen million, nine hundred ninety-nine thousand, nine hundred eighty-one".