19247069 has 2 divisors, whose sum is σ = 19247070. Its totient is φ = 19247068.

The previous prime is 19247047. The next prime is 19247071. The reversal of 19247069 is 96074291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17530969 + 1716100 = 4187^2 + 1310^2 .

It is an emirp because it is prime and its reverse (96074291) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19247069 - 2⁸ = 19246813 is a prime.

It is a super-2 number, since 2×19247069² = 740899330181522, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 19247071, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19247089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9623534 + 9623535.

It is an arithmetic number, because the mean of its divisors is an integer number (9623535).

Almost surely, 2^19247069 is an apocalyptic number.

It is an amenable number.

19247069 is a deficient number, since it is larger than the sum of its proper divisors (1).

19247069 is an equidigital number, since it uses as much as digits as its factorization.

19247069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 19247069 is about 4387.1481625311. The cubic root of 19247069 is about 267.9918177126.

The spelling of 19247069 in words is "nineteen million, two hundred forty-seven thousand, sixty-nine".