19713373 has 2 divisors, whose sum is σ = 19713374. Its totient is φ = 19713372.

The previous prime is 19713371. The next prime is 19713377. The reversal of 19713373 is 37331791.

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., 15705369 + 4008004 = 3963^2 + 2002^2 .

It is a cyclic number.

It is not a de Polignac number, because 19713373 - 2¹ = 19713371 is a prime.

Together with 19713371, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19713371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9856686 + 9856687.

It is an arithmetic number, because the mean of its divisors is an integer number (9856687).

Almost surely, 2^19713373 is an apocalyptic number.

It is an amenable number.

19713373 is a deficient number, since it is larger than the sum of its proper divisors (1).

19713373 is an equidigital number, since it uses as much as digits as its factorization.

19713373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11907, while the sum is 34.

The square root of 19713373 is about 4439.9744368633. The cubic root of 19713373 is about 270.1388083696.

The spelling of 19713373 in words is "nineteen million, seven hundred thirteen thousand, three hundred seventy-three".