1919231 has 2 divisors, whose sum is σ = 1919232. Its totient is φ = 1919230.

The previous prime is 1919161. The next prime is 1919273. The reversal of 1919231 is 1329191.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1919231 - 2¹⁴ = 1902847 is a prime.

It is a super-2 number, since 2×1919231² = 7366895262722, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1919231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1919431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959615 + 959616.

It is an arithmetic number, because the mean of its divisors is an integer number (959616).

2^1919231 is an apocalyptic number.

1919231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1919231 is an equidigital number, since it uses as much as digits as its factorization.

1919231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 26.

The square root of 1919231 is about 1385.3631292914. The cubic root of 1919231 is about 124.2727045376.

The spelling of 1919231 in words is "one million, nine hundred nineteen thousand, two hundred thirty-one".