74793821 has 2 divisors, whose sum is σ = 74793822. Its totient is φ = 74793820.

The previous prime is 74793811. The next prime is 74793827. The reversal of 74793821 is 12839747.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58905625 + 15888196 = 7675^2 + 3986^2 .

It is an emirp because it is prime and its reverse (12839747) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 74793821 - 2⁶ = 74793757 is a prime.

It is a Sophie Germain 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 (74793827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37396910 + 37396911.

It is an arithmetic number, because the mean of its divisors is an integer number (37396911).

Almost surely, 2^74793821 is an apocalyptic number.

It is an amenable number.

74793821 is a deficient number, since it is larger than the sum of its proper divisors (1).

74793821 is an equidigital number, since it uses as much as digits as its factorization.

74793821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 84672, while the sum is 41.

The square root of 74793821 is about 8648.3420954539. The cubic root of 74793821 is about 421.3295377641.

The spelling of 74793821 in words is "seventy-four million, seven hundred ninety-three thousand, eight hundred twenty-one".