19495493 has 2 divisors, whose sum is σ = 19495494. Its totient is φ = 19495492.

The previous prime is 19495471. The next prime is 19495517. The reversal of 19495493 is 39459491.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16337764 + 3157729 = 4042^2 + 1777^2 .

It is an emirp because it is prime and its reverse (39459491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19495493 - 2¹⁰ = 19494469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19495403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9747746 + 9747747.

It is an arithmetic number, because the mean of its divisors is an integer number (9747747).

Almost surely, 2^19495493 is an apocalyptic number.

It is an amenable number.

19495493 is a deficient number, since it is larger than the sum of its proper divisors (1).

19495493 is an equidigital number, since it uses as much as digits as its factorization.

19495493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 44.

The square root of 19495493 is about 4415.3700864140. The cubic root of 19495493 is about 269.1398921354.

The spelling of 19495493 in words is "nineteen million, four hundred ninety-five thousand, four hundred ninety-three".