83812869 has 24 divisors (see below), whose sum is σ = 138599552. Its totient is φ = 47809440.

The previous prime is 83812867. The next prime is 83812877. The reversal of 83812869 is 96821838.

It is not a de Polignac number, because 83812869 - 2¹ = 83812867 is a prime.

It is a super-2 number, since 2×83812869² = 14049194020022322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83812867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 63672 + ... + 64974.

Almost surely, 2^83812869 is an apocalyptic number.

It is an amenable number.

83812869 is a deficient number, since it is larger than the sum of its proper divisors (54786683).

83812869 is a wasteful number, since it uses less digits than its factorization.

83812869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2337 (or 2334 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 83812869 is about 9154.9368648833. The cubic root of 83812869 is about 437.6264563975.

It can be divided in two parts, 83812 and 869, that added together give a square (84681 = 291²).

The spelling of 83812869 in words is "eighty-three million, eight hundred twelve thousand, eight hundred sixty-nine".