7975001009 has 4 divisors (see below), whose sum is σ = 7975503204. Its totient is φ = 7974498816.

The previous prime is 7975001003. The next prime is 7975001029. The reversal of 7975001009 is 9001005797.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2610903409 + 5364097600 = 51097^2 + 73240^2 .

It is a cyclic number.

It is not a de Polignac number, because 7975001009 - 2⁴ = 7975000993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7975001003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226472 + ... + 259305.

It is an arithmetic number, because the mean of its divisors is an integer number (1993875801).

Almost surely, 2^7975001009 is an apocalyptic number.

It is an amenable number.

7975001009 is a deficient number, since it is larger than the sum of its proper divisors (502195).

7975001009 is a wasteful number, since it uses less digits than its factorization.

7975001009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502194.

The product of its (nonzero) digits is 19845, while the sum is 38.

The square root of 7975001009 is about 89302.8611467740. The cubic root of 7975001009 is about 1997.9145770113.

The spelling of 7975001009 in words is "seven billion, nine hundred seventy-five million, one thousand, nine".