839987069 has 4 divisors (see below), whose sum is σ = 859521696. Its totient is φ = 820452444.

The previous prime is 839987063. The next prime is 839987077. The reversal of 839987069 is 960789938.

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 not a de Polignac number, because 839987069 - 2¹² = 839982973 is a prime.

It is a super-2 number, since 2×839987069² = 1411156552174421522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 839986999 and 839987017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (839987063) 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, 9767249 + ... + 9767334.

It is an arithmetic number, because the mean of its divisors is an integer number (214880424).

Almost surely, 2^839987069 is an apocalyptic number.

It is an amenable number.

839987069 is a deficient number, since it is larger than the sum of its proper divisors (19534627).

839987069 is a wasteful number, since it uses less digits than its factorization.

839987069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19534626.

The product of its (nonzero) digits is 5878656, while the sum is 59.

The square root of 839987069 is about 28982.5304105766. The cubic root of 839987069 is about 943.5339544114.

The spelling of 839987069 in words is "eight hundred thirty-nine million, nine hundred eighty-seven thousand, sixty-nine".