75561427 has 2 divisors, whose sum is σ = 75561428. Its totient is φ = 75561426.

The previous prime is 75561419. The next prime is 75561467. The reversal of 75561427 is 72416557.

It is a weak prime.

It is an emirp because it is prime and its reverse (72416557) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75561427 - 2³ = 75561419 is a prime.

It is not a weakly prime, because it can be changed into another prime (75561467) 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, 37780713 + 37780714.

It is an arithmetic number, because the mean of its divisors is an integer number (37780714).

Almost surely, 2^75561427 is an apocalyptic number.

75561427 is a deficient number, since it is larger than the sum of its proper divisors (1).

75561427 is an equidigital number, since it uses as much as digits as its factorization.

75561427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58800, while the sum is 37.

The square root of 75561427 is about 8692.6076064665. The cubic root of 75561427 is about 422.7659975484.

The spelling of 75561427 in words is "seventy-five million, five hundred sixty-one thousand, four hundred twenty-seven".