82643746 has 4 divisors (see below), whose sum is σ = 123965622. Its totient is φ = 41321872.

The previous prime is 82643723. The next prime is 82643753. The reversal of 82643746 is 64734628.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 59459521 + 23184225 = 7711^2 + 4815^2 .

It is a junction number, because it is equal to n+sod(n) for n = 82643699 and 82643708.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20660935 + ... + 20660938.

Almost surely, 2^82643746 is an apocalyptic number.

82643746 is a deficient number, since it is larger than the sum of its proper divisors (41321876).

82643746 is a wasteful number, since it uses less digits than its factorization.

82643746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41321875.

The product of its digits is 193536, while the sum is 40.

The square root of 82643746 is about 9090.8605753251. The cubic root of 82643746 is about 435.5820736444.

The spelling of 82643746 in words is "eighty-two million, six hundred forty-three thousand, seven hundred forty-six".