75941821 has 2 divisors, whose sum is σ = 75941822. Its totient is φ = 75941820.

The previous prime is 75941779. The next prime is 75941849. The reversal of 75941821 is 12814957.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65772100 + 10169721 = 8110^2 + 3189^2 .

It is a cyclic number.

It is not a de Polignac number, because 75941821 - 2²¹ = 73844669 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75941851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37970910 + 37970911.

It is an arithmetic number, because the mean of its divisors is an integer number (37970911).

Almost surely, 2^75941821 is an apocalyptic number.

It is an amenable number.

75941821 is a deficient number, since it is larger than the sum of its proper divisors (1).

75941821 is an equidigital number, since it uses as much as digits as its factorization.

75941821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 37.

The square root of 75941821 is about 8714.4604537516. The cubic root of 75941821 is about 423.4742448771.

The spelling of 75941821 in words is "seventy-five million, nine hundred forty-one thousand, eight hundred twenty-one".