84669869 has 4 divisors (see below), whose sum is σ = 85071360. Its totient is φ = 84268380.

The previous prime is 84669863. The next prime is 84669887. The reversal of 84669869 is 96896648.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-84669869 is a prime.

It is a super-2 number, since 2×84669869² = 14337973432954322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84669863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200429 + ... + 200850.

It is an arithmetic number, because the mean of its divisors is an integer number (21267840).

Almost surely, 2^84669869 is an apocalyptic number.

It is an amenable number.

84669869 is a deficient number, since it is larger than the sum of its proper divisors (401491).

84669869 is a wasteful number, since it uses less digits than its factorization.

84669869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401490.

The product of its digits is 4478976, while the sum is 56.

The square root of 84669869 is about 9201.6231720279. The cubic root of 84669869 is about 439.1130013186.

The spelling of 84669869 in words is "eighty-four million, six hundred sixty-nine thousand, eight hundred sixty-nine".