75945481 has 2 divisors, whose sum is σ = 75945482. Its totient is φ = 75945480.

The previous prime is 75945469. The next prime is 75945487. The reversal of 75945481 is 18454957.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49843600 + 26101881 = 7060^2 + 5109^2 .

It is an emirp because it is prime and its reverse (18454957) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75945481 is a prime.

It is a super-2 number, since 2×75945481² = 11535432168642722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75945487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37972740 + 37972741.

It is an arithmetic number, because the mean of its divisors is an integer number (37972741).

Almost surely, 2^75945481 is an apocalyptic number.

It is an amenable number.

75945481 is a deficient number, since it is larger than the sum of its proper divisors (1).

75945481 is an equidigital number, since it uses as much as digits as its factorization.

75945481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 201600, while the sum is 43.

The square root of 75945481 is about 8714.6704470106. The cubic root of 75945481 is about 423.4810478517.

The spelling of 75945481 in words is "seventy-five million, nine hundred forty-five thousand, four hundred eighty-one".