75081857 has 2 divisors, whose sum is σ = 75081858. Its totient is φ = 75081856.

The previous prime is 75081791. The next prime is 75081859. The reversal of 75081857 is 75818057.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73342096 + 1739761 = 8564^2 + 1319^2 .

It is a cyclic number.

It is not a de Polignac number, because 75081857 - 2¹⁰ = 75080833 is a prime.

Together with 75081859, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75081859) 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, 37540928 + 37540929.

It is an arithmetic number, because the mean of its divisors is an integer number (37540929).

Almost surely, 2^75081857 is an apocalyptic number.

It is an amenable number.

75081857 is a deficient number, since it is larger than the sum of its proper divisors (1).

75081857 is an equidigital number, since it uses as much as digits as its factorization.

75081857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78400, while the sum is 41.

The square root of 75081857 is about 8664.9787651211. The cubic root of 75081857 is about 421.8697010180.

The spelling of 75081857 in words is "seventy-five million, eighty-one thousand, eight hundred fifty-seven".