83679642 has 20 divisors (see below), whose sum is σ = 187504746. Its totient is φ = 27893160.

The previous prime is 83679637. The next prime is 83679643. The reversal of 83679642 is 24697638.

It can be written as a sum of positive squares in only one way, i.e., 74805201 + 8874441 = 8649^2 + 2979^2 .

It is not an unprimeable number, because it can be changed into a prime (83679643) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 258109 + ... + 258432.

Almost surely, 2^83679642 is an apocalyptic number.

83679642 is an abundant number, since it is smaller than the sum of its proper divisors (103825104).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

83679642 is a wasteful number, since it uses less digits than its factorization.

83679642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516555 (or 516546 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 83679642 is about 9147.6577329937. The cubic root of 83679642 is about 437.3944531239.

The spelling of 83679642 in words is "eighty-three million, six hundred seventy-nine thousand, six hundred forty-two".