1956839 has 2 divisors, whose sum is σ = 1956840. Its totient is φ = 1956838.

The previous prime is 1956811. The next prime is 1956847. The reversal of 1956839 is 9386591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1956839 - 2⁸ = 1956583 is a prime.

It is a super-3 number, since 3×1956839³ = 22479494484333053157, which contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1956796 and 1956805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1956859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 978419 + 978420.

It is an arithmetic number, because the mean of its divisors is an integer number (978420).

2^1956839 is an apocalyptic number.

1956839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1956839 is an equidigital number, since it uses as much as digits as its factorization.

1956839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 41.

The square root of 1956839 is about 1398.8706158898. The cubic root of 1956839 is about 125.0791818313.

The spelling of 1956839 in words is "one million, nine hundred fifty-six thousand, eight hundred thirty-nine".