75520691 has 2 divisors, whose sum is σ = 75520692. Its totient is φ = 75520690.

The previous prime is 75520673. The next prime is 75520721. The reversal of 75520691 is 19602557.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75520691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (75520631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37760345 + 37760346.

It is an arithmetic number, because the mean of its divisors is an integer number (37760346).

Almost surely, 2^75520691 is an apocalyptic number.

75520691 is a deficient number, since it is larger than the sum of its proper divisors (1).

75520691 is an equidigital number, since it uses as much as digits as its factorization.

75520691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 75520691 is about 8690.2641501855. The cubic root of 75520691 is about 422.6900112852.

The spelling of 75520691 in words is "seventy-five million, five hundred twenty thousand, six hundred ninety-one".