83656642 has 8 divisors (see below), whose sum is σ = 125599500. Its totient is φ = 41790144.

The previous prime is 83656637. The next prime is 83656649. The reversal of 83656642 is 24665638.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 68376361 + 15280281 = 8269^2 + 3909^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 83656595 and 83656604.

It is not an unprimeable number, because it can be changed into a prime (83656649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16267 + ... + 20782.

Almost surely, 2^83656642 is an apocalyptic number.

83656642 is a deficient number, since it is larger than the sum of its proper divisors (41942858).

83656642 is a wasteful number, since it uses less digits than its factorization.

83656642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38180.

The product of its digits is 207360, while the sum is 40.

The square root of 83656642 is about 9146.4004941835. The cubic root of 83656642 is about 437.3543756968.

The spelling of 83656642 in words is "eighty-three million, six hundred fifty-six thousand, six hundred forty-two".