8206981957 has 8 divisors (see below), whose sum is σ = 8223857856. Its totient is φ = 8190121632.

The previous prime is 8206981903. The next prime is 8206981963. The reversal of 8206981957 is 7591896028.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8206981957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8206981898 and 8206981907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8206981457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1894528 + ... + 1898854.

It is an arithmetic number, because the mean of its divisors is an integer number (1027982232).

Almost surely, 2^8206981957 is an apocalyptic number.

It is an amenable number.

8206981957 is a deficient number, since it is larger than the sum of its proper divisors (16875899).

8206981957 is a wasteful number, since it uses less digits than its factorization.

8206981957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7787.

The product of its (nonzero) digits is 2177280, while the sum is 55.

The square root of 8206981957 is about 90592.3945869630. The cubic root of 8206981957 is about 2017.1018430793.

The spelling of 8206981957 in words is "eight billion, two hundred six million, nine hundred eighty-one thousand, nine hundred fifty-seven".