75049081 has 2 divisors, whose sum is σ = 75049082. Its totient is φ = 75049080.

The previous prime is 75049049. The next prime is 75049097. The reversal of 75049081 is 18094057.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73874025 + 1175056 = 8595^2 + 1084^2 .

It is a cyclic number.

It is not a de Polignac number, because 75049081 - 2⁵ = 75049049 is a prime.

It is a super-2 number, since 2×75049081² = 11264729117889122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75049001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37524540 + 37524541.

It is an arithmetic number, because the mean of its divisors is an integer number (37524541).

Almost surely, 2^75049081 is an apocalyptic number.

It is an amenable number.

75049081 is a deficient number, since it is larger than the sum of its proper divisors (1).

75049081 is an equidigital number, since it uses as much as digits as its factorization.

75049081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 75049081 is about 8663.0872672506. The cubic root of 75049081 is about 421.8083048548.

The spelling of 75049081 in words is "seventy-five million, forty-nine thousand, eighty-one".