1955831 has 2 divisors, whose sum is σ = 1955832. Its totient is φ = 1955830.

The previous prime is 1955827. The next prime is 1955839. The reversal of 1955831 is 1385591.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1955831 - 2² = 1955827 is a prime.

It is a super-2 number, since 2×1955831² = 7650549801122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1955839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977915 + 977916.

It is an arithmetic number, because the mean of its divisors is an integer number (977916).

2^1955831 is an apocalyptic number.

1955831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1955831 is an equidigital number, since it uses as much as digits as its factorization.

1955831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 32.

The square root of 1955831 is about 1398.5102788324. The cubic root of 1955831 is about 125.0577013603.

The spelling of 1955831 in words is "one million, nine hundred fifty-five thousand, eight hundred thirty-one".