3123889 has 4 divisors (see below), whose sum is σ = 3166756. Its totient is φ = 3081024.

The previous prime is 3123881. The next prime is 3123893. The reversal of 3123889 is 9883213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1703025 + 1420864 = 1305^2 + 1192^2 .

It is a cyclic number.

It is not a de Polignac number, because 3123889 - 2³ = 3123881 is a prime.

It is a Duffinian number.

3123889 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3123881) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21324 + ... + 21469.

It is an arithmetic number, because the mean of its divisors is an integer number (791689).

Almost surely, 2^3123889 is an apocalyptic number.

It is an amenable number.

3123889 is a deficient number, since it is larger than the sum of its proper divisors (42867).

3123889 is an equidigital number, since it uses as much as digits as its factorization.

3123889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42866.

The product of its digits is 10368, while the sum is 34.

The square root of 3123889 is about 1767.4526867783. The cubic root of 3123889 is about 146.1835590772.

The spelling of 3123889 in words is "three million, one hundred twenty-three thousand, eight hundred eighty-nine".