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19981373 is a prime number
BaseRepresentation
bin100110000111…
…0010000111101
31101121011021212
41030032100331
520103400443
61552134205
7331560506
oct114162075
941534255
1019981373
1110308335
126837365
1341a7ac9
142921bad
151b4a618
hex130e43d

19981373 has 2 divisors, whose sum is σ = 19981374. Its totient is φ = 19981372.

The previous prime is 19981361. The next prime is 19981397. The reversal of 19981373 is 37318991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10903204 + 9078169 = 3302^2 + 3013^2 .

19981373 is a truncatable prime.

It is an emirp because it is prime and its reverse (37318991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19981373 - 212 = 19977277 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19981373.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19981303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9990686 + 9990687.

It is an arithmetic number, because the mean of its divisors is an integer number (9990687).

Almost surely, 219981373 is an apocalyptic number.

It is an amenable number.

19981373 is a deficient number, since it is larger than the sum of its proper divisors (1).

19981373 is an equidigital number, since it uses as much as digits as its factorization.

19981373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40824, while the sum is 41.

The square root of 19981373 is about 4470.0529079643. The cubic root of 19981373 is about 271.3574663897.

The spelling of 19981373 in words is "nineteen million, nine hundred eighty-one thousand, three hundred seventy-three".