75138757 has 2 divisors, whose sum is σ = 75138758. Its totient is φ = 75138756.

The previous prime is 75138737. The next prime is 75138779. The reversal of 75138757 is 75783157.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67881121 + 7257636 = 8239^2 + 2694^2 .

It is a cyclic number.

It is not a de Polignac number, because 75138757 - 2⁷ = 75138629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75138737) 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, 37569378 + 37569379.

It is an arithmetic number, because the mean of its divisors is an integer number (37569379).

Almost surely, 2^75138757 is an apocalyptic number.

It is an amenable number.

75138757 is a deficient number, since it is larger than the sum of its proper divisors (1).

75138757 is an equidigital number, since it uses as much as digits as its factorization.

75138757 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 205800, while the sum is 43.

The square root of 75138757 is about 8668.2614750595. The cubic root of 75138757 is about 421.9762439552.

The spelling of 75138757 in words is "seventy-five million, one hundred thirty-eight thousand, seven hundred fifty-seven".