75563149 has 2 divisors, whose sum is σ = 75563150. Its totient is φ = 75563148.

The previous prime is 75563143. The next prime is 75563161. The reversal of 75563149 is 94136557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 73222249 + 2340900 = 8557^2 + 1530^2 .

It is a cyclic number.

It is not a de Polignac number, because 75563149 - 2³ = 75563141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75563141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37781574 + 37781575.

It is an arithmetic number, because the mean of its divisors is an integer number (37781575).

Almost surely, 2^75563149 is an apocalyptic number.

It is an amenable number.

75563149 is a deficient number, since it is larger than the sum of its proper divisors (1).

75563149 is an equidigital number, since it uses as much as digits as its factorization.

75563149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 113400, while the sum is 40.

The square root of 75563149 is about 8692.7066555820. The cubic root of 75563149 is about 422.7692090526.

The spelling of 75563149 in words is "seventy-five million, five hundred sixty-three thousand, one hundred forty-nine".