8137211969 has 4 divisors (see below), whose sum is σ = 8137439700. Its totient is φ = 8136984240.

The previous prime is 8137211963. The next prime is 8137211983. The reversal of 8137211969 is 9691127318.

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 3504640000 + 4632571969 = 59200^2 + 68063^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8137211969 is a prime.

It is a super-2 number, since 2×8137211969² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8137211963) 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, 47294 + ... + 136055.

It is an arithmetic number, because the mean of its divisors is an integer number (2034359925).

Almost surely, 2^8137211969 is an apocalyptic number.

It is an amenable number.

8137211969 is a deficient number, since it is larger than the sum of its proper divisors (227731).

8137211969 is a wasteful number, since it uses less digits than its factorization.

8137211969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227730.

The product of its digits is 163296, while the sum is 47.

The square root of 8137211969 is about 90206.4962682844. The cubic root of 8137211969 is about 2011.3695746599.

The spelling of 8137211969 in words is "eight billion, one hundred thirty-seven million, two hundred eleven thousand, nine hundred sixty-nine".