75047761 has 2 divisors, whose sum is σ = 75047762. Its totient is φ = 75047760.

The previous prime is 75047743. The next prime is 75047773. The reversal of 75047761 is 16774057.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74649600 + 398161 = 8640^2 + 631^2 .

It is a cyclic number.

It is not a de Polignac number, because 75047761 - 2⁷ = 75047633 is a prime.

It is a super-2 number, since 2×75047761² = 11264332862226242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 75047761.

It is not a weakly prime, because it can be changed into another prime (75047461) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37523880 + 37523881.

It is an arithmetic number, because the mean of its divisors is an integer number (37523881).

Almost surely, 2^75047761 is an apocalyptic number.

It is an amenable number.

75047761 is a deficient number, since it is larger than the sum of its proper divisors (1).

75047761 is an equidigital number, since it uses as much as digits as its factorization.

75047761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 41160, while the sum is 37.

The square root of 75047761 is about 8663.0110816044. The cubic root of 75047761 is about 421.8058318500.

The spelling of 75047761 in words is "seventy-five million, forty-seven thousand, seven hundred sixty-one".