1918019 has 2 divisors, whose sum is σ = 1918020. Its totient is φ = 1918018.

The previous prime is 1918013. The next prime is 1918027. The reversal of 1918019 is 9108191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1918019 - 2⁴ = 1918003 is a prime.

It is a super-2 number, since 2×1918019² = 7357593768722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1917982 and 1918000.

It is not a weakly prime, because it can be changed into another prime (1918013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959009 + 959010.

It is an arithmetic number, because the mean of its divisors is an integer number (959010).

2^1918019 is an apocalyptic number.

1918019 is a deficient number, since it is larger than the sum of its proper divisors (1).

1918019 is an equidigital number, since it uses as much as digits as its factorization.

1918019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 29.

The square root of 1918019 is about 1384.9256297722. The cubic root of 1918019 is about 124.2465395034.

The spelling of 1918019 in words is "one million, nine hundred eighteen thousand, nineteen".