8142971869 has 4 divisors (see below), whose sum is σ = 8175414240. Its totient is φ = 8110529500.

The previous prime is 8142971867. The next prime is 8142971983. The reversal of 8142971869 is 9681792418.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 8142971869 - 2¹ = 8142971867 is a prime.

It is a super-2 number, since 2×8142971869² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8142971861) 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, 16220809 + ... + 16221310.

It is an arithmetic number, because the mean of its divisors is an integer number (2043853560).

Almost surely, 2^8142971869 is an apocalyptic number.

It is an amenable number.

8142971869 is a deficient number, since it is larger than the sum of its proper divisors (32442371).

8142971869 is a wasteful number, since it uses less digits than its factorization.

8142971869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32442370.

The product of its digits is 1741824, while the sum is 55.

The square root of 8142971869 is about 90238.4168134614. The cubic root of 8142971869 is about 2011.8440432779.

The spelling of 8142971869 in words is "eight billion, one hundred forty-two million, nine hundred seventy-one thousand, eight hundred sixty-nine".