3865137069 has 4 divisors (see below), whose sum is σ = 5153516096. Its totient is φ = 2576758044.

The previous prime is 3865137049. The next prime is 3865137077. The reversal of 3865137069 is 9607315683.

It is a happy number.

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 not a de Polignac number, because 3865137069 - 2⁵ = 3865137037 is a prime.

It is a super-2 number, since 2×3865137069² = 29878569124315821522, 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 (3865137049) 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, 644189509 + ... + 644189514.

It is an arithmetic number, because the mean of its divisors is an integer number (1288379024).

Almost surely, 2^3865137069 is an apocalyptic number.

It is an amenable number.

3865137069 is a deficient number, since it is larger than the sum of its proper divisors (1288379027).

3865137069 is a wasteful number, since it uses less digits than its factorization.

3865137069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1288379026.

The product of its (nonzero) digits is 816480, while the sum is 48.

The square root of 3865137069 is about 62170.2265477616. The cubic root of 3865137069 is about 1569.3565823348.

The spelling of 3865137069 in words is "three billion, eight hundred sixty-five million, one hundred thirty-seven thousand, sixty-nine".