75625009 has 4 divisors (see below), whose sum is σ = 75697216. Its totient is φ = 75552804.

The previous prime is 75625001. The next prime is 75625013. The reversal of 75625009 is 90052657.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90052657 = 661 ⋅136237.

It is a cyclic number.

It is not a de Polignac number, because 75625009 - 2³ = 75625001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75625001) 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 in 3 ways as a sum of consecutive naturals, for example, 34509 + ... + 36634.

It is an arithmetic number, because the mean of its divisors is an integer number (18924304).

Almost surely, 2^75625009 is an apocalyptic number.

It is an amenable number.

75625009 is a deficient number, since it is larger than the sum of its proper divisors (72207).

75625009 is a wasteful number, since it uses less digits than its factorization.

75625009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72206.

The product of its (nonzero) digits is 18900, while the sum is 34.

The square root of 75625009 is about 8696.2640829266. The cubic root of 75625009 is about 422.8845446813.

It can be divided in two parts, 7562500 and 9, that multiplied together give a square (68062500 = 8250²).

The spelling of 75625009 in words is "seventy-five million, six hundred twenty-five thousand, nine".