3129897 has 4 divisors (see below), whose sum is σ = 4173200. Its totient is φ = 2086596.

The previous prime is 3129859. The next prime is 3129911. The reversal of 3129897 is 7989213.

3129897 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 3129897 - 2⁷ = 3129769 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3129827) 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, 521647 + ... + 521652.

It is an arithmetic number, because the mean of its divisors is an integer number (1043300).

Almost surely, 2^3129897 is an apocalyptic number.

It is an amenable number.

3129897 is a deficient number, since it is larger than the sum of its proper divisors (1043303).

3129897 is a wasteful number, since it uses less digits than its factorization.

3129897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043302.

The product of its digits is 27216, while the sum is 39.

The square root of 3129897 is about 1769.1514915349. The cubic root of 3129897 is about 146.2772146009.

The spelling of 3129897 in words is "three million, one hundred twenty-nine thousand, eight hundred ninety-seven".