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19294921 is a prime number
BaseRepresentation
bin100100110011…
…0101011001001
31100022021122201
41021212223021
514414414141
61525320201
7323001262
oct111465311
940267581
1019294921
11a989618
126566061
133cc7519
1427c3969
151a62031
hex1266ac9

19294921 has 2 divisors, whose sum is σ = 19294922. Its totient is φ = 19294920.

The previous prime is 19294903. The next prime is 19294981. The reversal of 19294921 is 12949291.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16281225 + 3013696 = 4035^2 + 1736^2 .

It is a cyclic number.

It is not a de Polignac number, because 19294921 - 29 = 19294409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19294901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9647460 + 9647461.

It is an arithmetic number, because the mean of its divisors is an integer number (9647461).

Almost surely, 219294921 is an apocalyptic number.

It is an amenable number.

19294921 is a deficient number, since it is larger than the sum of its proper divisors (1).

19294921 is an equidigital number, since it uses as much as digits as its factorization.

19294921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 37.

The square root of 19294921 is about 4392.5984337292. The cubic root of 19294921 is about 268.2137273706.

The spelling of 19294921 in words is "nineteen million, two hundred ninety-four thousand, nine hundred twenty-one".