3129387 has 8 divisors (see below), whose sum is σ = 4182336. Its totient is φ = 2081352.

The previous prime is 3129383. The next prime is 3129391. The reversal of 3129387 is 7839213.

3129387 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3129383) and next prime (3129391).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 3129387 - 2² = 3129383 is a prime.

3129387 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (3129383) 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 7 ways as a sum of consecutive naturals, for example, 688 + ... + 2594.

It is an arithmetic number, because the mean of its divisors is an integer number (522792).

Almost surely, 2^3129387 is an apocalyptic number.

3129387 is a deficient number, since it is larger than the sum of its proper divisors (1052949).

3129387 is a wasteful number, since it uses less digits than its factorization.

3129387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2457.

The product of its digits is 9072, while the sum is 33.

The square root of 3129387 is about 1769.0073487694. The cubic root of 3129387 is about 146.2692691391.

The spelling of 3129387 in words is "three million, one hundred twenty-nine thousand, three hundred eighty-seven".