1964943 has 12 divisors (see below), whose sum is σ = 2865720. Its totient is φ = 1297296.

The previous prime is 1964927. The next prime is 1964947. The reversal of 1964943 is 3494691.

1964943 is a `hidden beast` number, since 1 + 9 + 649 + 4 + 3 = 666.

It is not a de Polignac number, because 1964943 - 2⁴ = 1964927 is a prime.

It is a super-2 number, since 2×1964943² = 7722001986498, which contains 22 as substring.

1964943 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1964898 and 1964907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1964947) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21 + ... + 1982.

It is an arithmetic number, because the mean of its divisors is an integer number (238810).

2^1964943 is an apocalyptic number.

1964943 is a deficient number, since it is larger than the sum of its proper divisors (900777).

1964943 is a wasteful number, since it uses less digits than its factorization.

1964943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2118 (or 2115 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 1964943 is about 1401.7642455135. The cubic root of 1964943 is about 125.2516105306.

The spelling of 1964943 in words is "one million, nine hundred sixty-four thousand, nine hundred forty-three".