82391042 has 4 divisors (see below), whose sum is σ = 123586566. Its totient is φ = 41195520.

The previous prime is 82391041. The next prime is 82391063. The reversal of 82391042 is 24019328.

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., 54184321 + 28206721 = 7361^2 + 5311^2 .

It is a junction number, because it is equal to n+sod(n) for n = 82390996 and 82391014.

It is not an unprimeable number, because it can be changed into a prime (82391041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20597759 + ... + 20597762.

Almost surely, 2^82391042 is an apocalyptic number.

82391042 is a deficient number, since it is larger than the sum of its proper divisors (41195524).

82391042 is a wasteful number, since it uses less digits than its factorization.

82391042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41195523.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 82391042 is about 9076.9511401131. The cubic root of 82391042 is about 435.1376531814.

The spelling of 82391042 in words is "eighty-two million, three hundred ninety-one thousand, forty-two".