19374493 has 2 divisors, whose sum is σ = 19374494. Its totient is φ = 19374492.

The previous prime is 19374469. The next prime is 19374497. The reversal of 19374493 is 39447391.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19035769 + 338724 = 4363^2 + 582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19374493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19374497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9687246 + 9687247.

It is an arithmetic number, because the mean of its divisors is an integer number (9687247).

Almost surely, 2^19374493 is an apocalyptic number.

It is an amenable number.

19374493 is a deficient number, since it is larger than the sum of its proper divisors (1).

19374493 is an equidigital number, since it uses as much as digits as its factorization.

19374493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 19374493 is about 4401.6466237080. The cubic root of 19374493 is about 268.5819249789.

The spelling of 19374493 in words is "nineteen million, three hundred seventy-four thousand, four hundred ninety-three".