1366019 has 2 divisors, whose sum is σ = 1366020. Its totient is φ = 1366018.

The previous prime is 1366009. The next prime is 1366021. The reversal of 1366019 is 9106631.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1366019 is a prime.

It is a super-2 number, since 2×1366019² = 3732015816722, which contains 22 as substring.

Together with 1366021, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1366009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683009 + 683010.

It is an arithmetic number, because the mean of its divisors is an integer number (683010).

2^1366019 is an apocalyptic number.

1366019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366019 is an equidigital number, since it uses as much as digits as its factorization.

1366019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 1366019 is about 1168.7681549392. The cubic root of 1366019 is about 110.9563716755.

The spelling of 1366019 in words is "one million, three hundred sixty-six thousand, nineteen".