19247117 has 2 divisors, whose sum is σ = 19247118. Its totient is φ = 19247116.

The previous prime is 19247099. The next prime is 19247149. The reversal of 19247117 is 71174291.

It is an a-pointer prime, because the next prime (19247149) can be obtained adding 19247117 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11485321 + 7761796 = 3389^2 + 2786^2 .

It is a cyclic number.

It is not a de Polignac number, because 19247117 - 2⁸ = 19246861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19247197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9623558 + 9623559.

It is an arithmetic number, because the mean of its divisors is an integer number (9623559).

Almost surely, 2^19247117 is an apocalyptic number.

It is an amenable number.

19247117 is a deficient number, since it is larger than the sum of its proper divisors (1).

19247117 is an equidigital number, since it uses as much as digits as its factorization.

19247117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528, while the sum is 32.

The square root of 19247117 is about 4387.1536330518. The cubic root of 19247117 is about 267.9920404928.

The spelling of 19247117 in words is "nineteen million, two hundred forty-seven thousand, one hundred seventeen".