75943421 has 2 divisors, whose sum is σ = 75943422. Its totient is φ = 75943420.

The previous prime is 75943409. The next prime is 75943429. The reversal of 75943421 is 12434957.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74476900 + 1466521 = 8630^2 + 1211^2 .

It is an emirp because it is prime and its reverse (12434957) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75943421 - 2¹⁰ = 75942397 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 (75943429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37971710 + 37971711.

It is an arithmetic number, because the mean of its divisors is an integer number (37971711).

Almost surely, 2^75943421 is an apocalyptic number.

It is an amenable number.

75943421 is a deficient number, since it is larger than the sum of its proper divisors (1).

75943421 is an equidigital number, since it uses as much as digits as its factorization.

75943421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 75943421 is about 8714.5522547059. The cubic root of 75943421 is about 423.4772188819.

The spelling of 75943421 in words is "seventy-five million, nine hundred forty-three thousand, four hundred twenty-one".