3181429 has 4 divisors (see below), whose sum is σ = 3319776. Its totient is φ = 3043084.

The previous prime is 3181421. The next prime is 3181447. The reversal of 3181429 is 9241813.

3181429 = T₁₄₂ + T₁₄₃ + ... + T₂₇₉.

It is a happy number.

3181429 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 3181429 - 2³ = 3181421 is a prime.

It is a Duffinian number.

3181429 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 3181397 and 3181406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3181421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69139 + ... + 69184.

It is an arithmetic number, because the mean of its divisors is an integer number (829944).

Almost surely, 2^3181429 is an apocalyptic number.

It is an amenable number.

3181429 is a deficient number, since it is larger than the sum of its proper divisors (138347).

3181429 is a wasteful number, since it uses less digits than its factorization.

3181429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138346.

The product of its digits is 1728, while the sum is 28.

The square root of 3181429 is about 1783.6560767143. The cubic root of 3181429 is about 147.0756394167.

The spelling of 3181429 in words is "three million, one hundred eighty-one thousand, four hundred twenty-nine".