8457131983 has 4 divisors (see below), whose sum is σ = 8484151888. Its totient is φ = 8430112080.

The previous prime is 8457131923. The next prime is 8457132007. The reversal of 8457131983 is 3891317548.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 8457131983 - 2⁹ = 8457131471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8457131923) 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, 13509483 + ... + 13510108.

It is an arithmetic number, because the mean of its divisors is an integer number (2121037972).

Almost surely, 2^8457131983 is an apocalyptic number.

8457131983 is a deficient number, since it is larger than the sum of its proper divisors (27019905).

8457131983 is a wasteful number, since it uses less digits than its factorization.

8457131983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27019904.

The product of its digits is 725760, while the sum is 49.

The square root of 8457131983 is about 91962.6662456021. Note that the first 3 decimals coincide. The cubic root of 8457131983 is about 2037.3909346214.

The spelling of 8457131983 in words is "eight billion, four hundred fifty-seven million, one hundred thirty-one thousand, nine hundred eighty-three".