8006521937 has 4 divisors (see below), whose sum is σ = 8006835876. Its totient is φ = 8006208000.

The previous prime is 8006521921. The next prime is 8006521961. The reversal of 8006521937 is 7391256008.

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 2152588816 + 5853933121 = 46396^2 + 76511^2 .

It is a cyclic number.

It is not a de Polignac number, because 8006521937 - 2⁴ = 8006521921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8006521894 and 8006521903.

It is not an unprimeable number, because it can be changed into a prime (8006521987) 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, 114968 + ... + 170969.

It is an arithmetic number, because the mean of its divisors is an integer number (2001708969).

Almost surely, 2^8006521937 is an apocalyptic number.

It is an amenable number.

8006521937 is a deficient number, since it is larger than the sum of its proper divisors (313939).

8006521937 is a wasteful number, since it uses less digits than its factorization.

8006521937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313938.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 8006521937 is about 89479.1704085370. The cubic root of 8006521937 is about 2000.5433471236.

The spelling of 8006521937 in words is "eight billion, six million, five hundred twenty-one thousand, nine hundred thirty-seven".