19974769 has 2 divisors, whose sum is σ = 19974770. Its totient is φ = 19974768.

The previous prime is 19974767. The next prime is 19974793. The reversal of 19974769 is 96747991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18318400 + 1656369 = 4280^2 + 1287^2 .

It is an emirp because it is prime and its reverse (96747991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19974769 - 2¹ = 19974767 is a prime.

It is a super-2 number, since 2×19974769² = 797982793206722, which contains 22 as substring.

Together with 19974767, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19974763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9987384 + 9987385.

It is an arithmetic number, because the mean of its divisors is an integer number (9987385).

Almost surely, 2^19974769 is an apocalyptic number.

It is an amenable number.

19974769 is a deficient number, since it is larger than the sum of its proper divisors (1).

19974769 is an equidigital number, since it uses as much as digits as its factorization.

19974769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 857304, while the sum is 52.

The square root of 19974769 is about 4469.3141532007. The cubic root of 19974769 is about 271.3275678408.

The spelling of 19974769 in words is "nineteen million, nine hundred seventy-four thousand, seven hundred sixty-nine".