82143494 has 4 divisors (see below), whose sum is σ = 123215244. Its totient is φ = 41071746.

The previous prime is 82143493. The next prime is 82143527. The reversal of 82143494 is 49434128.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82143491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20535872 + ... + 20535875.

It is an arithmetic number, because the mean of its divisors is an integer number (30803811).

Almost surely, 2^82143494 is an apocalyptic number.

82143494 is a deficient number, since it is larger than the sum of its proper divisors (41071750).

82143494 is a wasteful number, since it uses less digits than its factorization.

82143494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41071749.

The product of its digits is 27648, while the sum is 35.

The square root of 82143494 is about 9063.3048056435. The cubic root of 82143494 is about 434.7014183901.

The spelling of 82143494 in words is "eighty-two million, one hundred forty-three thousand, four hundred ninety-four".