83871604 has 6 divisors (see below), whose sum is σ = 146775314. Its totient is φ = 41935800.

The previous prime is 83871581. The next prime is 83871607. The reversal of 83871604 is 40617838.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 76527504 + 7344100 = 8748^2 + 2710^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83871607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10483947 + ... + 10483954.

Almost surely, 2^83871604 is an apocalyptic number.

It is an amenable number.

83871604 is a deficient number, since it is larger than the sum of its proper divisors (62903710).

83871604 is a wasteful number, since it uses less digits than its factorization.

83871604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20967905 (or 20967903 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 83871604 is about 9158.1441351400. The cubic root of 83871604 is about 437.7286602246.

The spelling of 83871604 in words is "eighty-three million, eight hundred seventy-one thousand, six hundred four".