7793921 has 2 divisors, whose sum is σ = 7793922. Its totient is φ = 7793920.

The previous prime is 7793917. The next prime is 7793957. The reversal of 7793921 is 1293977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5107600 + 2686321 = 2260^2 + 1639^2 .

It is an emirp because it is prime and its reverse (1293977) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7793921 - 2² = 7793917 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (7793521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3896960 + 3896961.

It is an arithmetic number, because the mean of its divisors is an integer number (3896961).

Almost surely, 2^7793921 is an apocalyptic number.

It is an amenable number.

7793921 is a deficient number, since it is larger than the sum of its proper divisors (1).

7793921 is an equidigital number, since it uses as much as digits as its factorization.

7793921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 38.

The square root of 7793921 is about 2791.7594810442. The cubic root of 7793921 is about 198.2677142493.

The spelling of 7793921 in words is "seven million, seven hundred ninety-three thousand, nine hundred twenty-one".