75107561 has 2 divisors, whose sum is σ = 75107562. Its totient is φ = 75107560.

The previous prime is 75107537. The next prime is 75107569. The reversal of 75107561 is 16570157.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61528336 + 13579225 = 7844^2 + 3685^2 .

It is an emirp because it is prime and its reverse (16570157) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75107561 - 2²² = 70913257 is a prime.

It is a super-2 number, since 2×75107561² = 11282291438737442, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75107569) 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, 37553780 + 37553781.

It is an arithmetic number, because the mean of its divisors is an integer number (37553781).

Almost surely, 2^75107561 is an apocalyptic number.

It is an amenable number.

75107561 is a deficient number, since it is larger than the sum of its proper divisors (1).

75107561 is an equidigital number, since it uses as much as digits as its factorization.

75107561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7350, while the sum is 32.

The square root of 75107561 is about 8666.4618501439. The cubic root of 75107561 is about 421.9178373767.

The spelling of 75107561 in words is "seventy-five million, one hundred seven thousand, five hundred sixty-one".