Search a number
19870063 is a prime number
BaseRepresentation
bin100101111001…
…1000101101111
31101101111121021
41023303011233
520041320223
61545515011
7330615133
oct113630557
941344537
1019870063
1110241744
1267a2a67
134169245
1428d33c3
151b2765d
hex12f316f

19870063 has 2 divisors, whose sum is σ = 19870064. Its totient is φ = 19870062.

The previous prime is 19870061. The next prime is 19870099. The reversal of 19870063 is 36007891.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19870063 - 21 = 19870061 is a prime.

Together with 19870061, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19870061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9935031 + 9935032.

It is an arithmetic number, because the mean of its divisors is an integer number (9935032).

Almost surely, 219870063 is an apocalyptic number.

19870063 is a deficient number, since it is larger than the sum of its proper divisors (1).

19870063 is an equidigital number, since it uses as much as digits as its factorization.

19870063 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 19870063 is about 4457.5848842170. The cubic root of 19870063 is about 270.8526452081.

The spelling of 19870063 in words is "nineteen million, eight hundred seventy thousand, sixty-three".