82970842 has 4 divisors (see below), whose sum is σ = 124456266. Its totient is φ = 41485420.

The previous prime is 82970831. The next prime is 82970843. The reversal of 82970842 is 24807928.

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., 54037201 + 28933641 = 7351^2 + 5379^2 .

It is a junction number, because it is equal to n+sod(n) for n = 82970795 and 82970804.

It is not an unprimeable number, because it can be changed into a prime (82970843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20742709 + ... + 20742712.

Almost surely, 2^82970842 is an apocalyptic number.

82970842 is a deficient number, since it is larger than the sum of its proper divisors (41485424).

82970842 is a wasteful number, since it uses less digits than its factorization.

82970842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41485423.

The product of its (nonzero) digits is 64512, while the sum is 40.

The square root of 82970842 is about 9108.8331854305. The cubic root of 82970842 is about 436.1559811401.

The spelling of 82970842 in words is "eighty-two million, nine hundred seventy thousand, eight hundred forty-two".