7929749 has 2 divisors, whose sum is σ = 7929750. Its totient is φ = 7929748.

The previous prime is 7929743. The next prime is 7929763. The reversal of 7929749 is 9479297.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4919524 + 3010225 = 2218^2 + 1735^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7929749 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7929743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3964874 + 3964875.

It is an arithmetic number, because the mean of its divisors is an integer number (3964875).

Almost surely, 2^7929749 is an apocalyptic number.

It is an amenable number.

7929749 is a deficient number, since it is larger than the sum of its proper divisors (1).

7929749 is an equidigital number, since it uses as much as digits as its factorization.

7929749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 47.

The square root of 7929749 is about 2815.9810013564. The cubic root of 7929749 is about 199.4128529787.

The spelling of 7929749 in words is "seven million, nine hundred twenty-nine thousand, seven hundred forty-nine".