3891233869 has 4 divisors (see below), whose sum is σ = 3904984096. Its totient is φ = 3877483644.

The previous prime is 3891233849. The next prime is 3891233893. The reversal of 3891233869 is 9683321983.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9683321983 = 28097 ⋅344639.

It is a cyclic number.

It is not a de Polignac number, because 3891233869 - 2¹⁷ = 3891102797 is a prime.

It is a super-2 number, since 2×3891233869² = 30283402046505418322, 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 (3891233809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6874689 + ... + 6875254.

It is an arithmetic number, because the mean of its divisors is an integer number (976246024).

Almost surely, 2^3891233869 is an apocalyptic number.

It is an amenable number.

3891233869 is a deficient number, since it is larger than the sum of its proper divisors (13750227).

3891233869 is a wasteful number, since it uses less digits than its factorization.

3891233869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13750226.

The product of its digits is 1679616, while the sum is 52.

The square root of 3891233869 is about 62379.7552816617. The cubic root of 3891233869 is about 1572.8806794105.

The spelling of 3891233869 in words is "three billion, eight hundred ninety-one million, two hundred thirty-three thousand, eight hundred sixty-nine".