75525109 has 4 divisors (see below), whose sum is σ = 82391040. Its totient is φ = 68659180.

The previous prime is 75525097. The next prime is 75525113. The reversal of 75525109 is 90152557.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 75525109 - 2⁹ = 75524597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (75525139) 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 in 3 ways as a sum of consecutive naturals, for example, 3432949 + ... + 3432970.

It is an arithmetic number, because the mean of its divisors is an integer number (20597760).

Almost surely, 2^75525109 is an apocalyptic number.

It is an amenable number.

75525109 is a deficient number, since it is larger than the sum of its proper divisors (6865931).

75525109 is a wasteful number, since it uses less digits than its factorization.

75525109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6865930.

The product of its (nonzero) digits is 15750, while the sum is 34.

The square root of 75525109 is about 8690.5183389715. The cubic root of 75525109 is about 422.6982536536.

The spelling of 75525109 in words is "seventy-five million, five hundred twenty-five thousand, one hundred nine".