83631861 has 12 divisors (see below), whose sum is σ = 123611488. Its totient is φ = 54457704.

The previous prime is 83631839. The next prime is 83631871. The reversal of 83631861 is 16813638.

It is not a de Polignac number, because 83631861 - 2⁶ = 83631797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83631811) 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 11 ways as a sum of consecutive naturals, for example, 107665 + ... + 108438.

Almost surely, 2^83631861 is an apocalyptic number.

It is an amenable number.

83631861 is a deficient number, since it is larger than the sum of its proper divisors (39979627).

83631861 is a wasteful number, since it uses less digits than its factorization.

83631861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216152 (or 216149 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 83631861 is about 9145.0457079230. The cubic root of 83631861 is about 437.3111866610.

The spelling of 83631861 in words is "eighty-three million, six hundred thirty-one thousand, eight hundred sixty-one".