65940943 has 4 divisors (see below), whose sum is σ = 69819840. Its totient is φ = 62062048.

The previous prime is 65940911. The next prime is 65940947. The reversal of 65940943 is 34904956.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 65940943 - 2⁵ = 65940911 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 65940896 and 65940905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65940947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1939423 + ... + 1939456.

It is an arithmetic number, because the mean of its divisors is an integer number (17454960).

Almost surely, 2^65940943 is an apocalyptic number.

65940943 is a deficient number, since it is larger than the sum of its proper divisors (3878897).

65940943 is a wasteful number, since it uses less digits than its factorization.

65940943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3878896.

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 65940943 is about 8120.4028840939. The cubic root of 65940943 is about 404.0034289648.

The spelling of 65940943 in words is "sixty-five million, nine hundred forty thousand, nine hundred forty-three".