10643939 has 2 divisors, whose sum is σ = 10643940. Its totient is φ = 10643938.

The previous prime is 10643929. The next prime is 10643981. The reversal of 10643939 is 93934601.

10643939 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10643939 - 2¹² = 10639843 is a prime.

It is a super-2 number, since 2×10643939² = 226586874871442, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 10643899 and 10643908.

It is not a weakly prime, because it can be changed into another prime (10643929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5321969 + 5321970.

It is an arithmetic number, because the mean of its divisors is an integer number (5321970).

Almost surely, 2^10643939 is an apocalyptic number.

10643939 is a deficient number, since it is larger than the sum of its proper divisors (1).

10643939 is an equidigital number, since it uses as much as digits as its factorization.

10643939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 10643939 is about 3262.5050191532. The cubic root of 10643939 is about 219.9720281241.

The spelling of 10643939 in words is "ten million, six hundred forty-three thousand, nine hundred thirty-nine".