75239081 has 2 divisors, whose sum is σ = 75239082. Its totient is φ = 75239080.

The previous prime is 75239071. The next prime is 75239113. The reversal of 75239081 is 18093257.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 44890000 + 30349081 = 6700^2 + 5509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75239081 is a prime.

It is a super-2 number, since 2×75239081² = 11321838619449122, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75239071) 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, 37619540 + 37619541.

It is an arithmetic number, because the mean of its divisors is an integer number (37619541).

Almost surely, 2^75239081 is an apocalyptic number.

It is an amenable number.

75239081 is a deficient number, since it is larger than the sum of its proper divisors (1).

75239081 is an equidigital number, since it uses as much as digits as its factorization.

75239081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 75239081 is about 8674.0464029195. The cubic root of 75239081 is about 422.1639656183.

The spelling of 75239081 in words is "seventy-five million, two hundred thirty-nine thousand, eighty-one".