7929643 has 2 divisors, whose sum is σ = 7929644. Its totient is φ = 7929642.

The previous prime is 7929637. The next prime is 7929683. The reversal of 7929643 is 3469297.

It is an a-pointer prime, because the next prime (7929683) can be obtained adding 7929643 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7929643 - 2¹³ = 7921451 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7929596 and 7929605.

It is not a weakly prime, because it can be changed into another prime (7929613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3964821 + 3964822.

It is an arithmetic number, because the mean of its divisors is an integer number (3964822).

Almost surely, 2^7929643 is an apocalyptic number.

7929643 is a deficient number, since it is larger than the sum of its proper divisors (1).

7929643 is an equidigital number, since it uses as much as digits as its factorization.

7929643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 40.

The square root of 7929643 is about 2815.9621801438. The cubic root of 7929643 is about 199.4119644320.

The spelling of 7929643 in words is "seven million, nine hundred twenty-nine thousand, six hundred forty-three".