3784139 has 4 divisors (see below), whose sum is σ = 3906240. Its totient is φ = 3662040.

The previous prime is 3784133. The next prime is 3784141. The reversal of 3784139 is 9314873.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9314873 = 73 ⋅127601.

It is a cyclic number.

It is not a de Polignac number, because 3784139 - 2¹² = 3780043 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3784099 and 3784108.

It is not an unprimeable number, because it can be changed into a prime (3784133) 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, 61004 + ... + 61065.

It is an arithmetic number, because the mean of its divisors is an integer number (976560).

Almost surely, 2^3784139 is an apocalyptic number.

3784139 is a deficient number, since it is larger than the sum of its proper divisors (122101).

3784139 is a wasteful number, since it uses less digits than its factorization.

3784139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122100.

The product of its digits is 18144, while the sum is 35.

The square root of 3784139 is about 1945.2863542420. The cubic root of 3784139 is about 155.8316587528.

The spelling of 3784139 in words is "three million, seven hundred eighty-four thousand, one hundred thirty-nine".