1901219 has 2 divisors, whose sum is σ = 1901220. Its totient is φ = 1901218.

The previous prime is 1901209. The next prime is 1901231. The reversal of 1901219 is 9121091.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1901219 is a prime.

It is a super-2 number, since 2×1901219² = 7229267371922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1901194 and 1901203.

It is not a weakly prime, because it can be changed into another prime (1901209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 950609 + 950610.

It is an arithmetic number, because the mean of its divisors is an integer number (950610).

2^1901219 is an apocalyptic number.

1901219 is a deficient number, since it is larger than the sum of its proper divisors (1).

1901219 is an equidigital number, since it uses as much as digits as its factorization.

1901219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 1901219 is about 1378.8469820832. The cubic root of 1901219 is about 123.8827151509.

The spelling of 1901219 in words is "one million, nine hundred one thousand, two hundred nineteen".