75427081 has 2 divisors, whose sum is σ = 75427082. Its totient is φ = 75427080.

The previous prime is 75427073. The next prime is 75427087. The reversal of 75427081 is 18072457.

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., 75342400 + 84681 = 8680^2 + 291^2 .

It is a cyclic number.

It is not a de Polignac number, because 75427081 - 2³ = 75427073 is a prime.

It is a super-2 number, since 2×75427081² = 11378489096361122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75427087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37713540 + 37713541.

It is an arithmetic number, because the mean of its divisors is an integer number (37713541).

Almost surely, 2^75427081 is an apocalyptic number.

It is an amenable number.

75427081 is a deficient number, since it is larger than the sum of its proper divisors (1).

75427081 is an equidigital number, since it uses as much as digits as its factorization.

75427081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 75427081 is about 8684.8765679197. The cubic root of 75427081 is about 422.5152937288.

The spelling of 75427081 in words is "seventy-five million, four hundred twenty-seven thousand, eighty-one".