19483993 has 2 divisors, whose sum is σ = 19483994. Its totient is φ = 19483992.

The previous prime is 19483963. The next prime is 19484009. The reversal of 19483993 is 39938491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18688329 + 795664 = 4323^2 + 892^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19483993 is a prime.

It is not a weakly prime, because it can be changed into another prime (19483943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9741996 + 9741997.

It is an arithmetic number, because the mean of its divisors is an integer number (9741997).

Almost surely, 2^19483993 is an apocalyptic number.

It is an amenable number.

19483993 is a deficient number, since it is larger than the sum of its proper divisors (1).

19483993 is an equidigital number, since it uses as much as digits as its factorization.

19483993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 209952, while the sum is 46.

The square root of 19483993 is about 4414.0676252183. The cubic root of 19483993 is about 269.0869616531.

The spelling of 19483993 in words is "nineteen million, four hundred eighty-three thousand, nine hundred ninety-three".