1965983 has 2 divisors, whose sum is σ = 1965984. Its totient is φ = 1965982.

The previous prime is 1965979. The next prime is 1966007. The reversal of 1965983 is 3895691.

It is a weak prime.

It is an emirp because it is prime and its reverse (3895691) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1965983 - 2² = 1965979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1965983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1965913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982991 + 982992.

It is an arithmetic number, because the mean of its divisors is an integer number (982992).

2^1965983 is an apocalyptic number.

1965983 is a deficient number, since it is larger than the sum of its proper divisors (1).

1965983 is an equidigital number, since it uses as much as digits as its factorization.

1965983 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 1965983 is about 1402.1351575365. The cubic root of 1965983 is about 125.2737042504.

It can be divided in two parts, 1965 and 983, that multiplied together give a triangular number (1931595 = T₁₉₆₅).

The spelling of 1965983 in words is "one million, nine hundred sixty-five thousand, nine hundred eighty-three".