3129797 has 4 divisors (see below), whose sum is σ = 3414336. Its totient is φ = 2845260.

The previous prime is 3129787. The next prime is 3129799. The reversal of 3129797 is 7979213.

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 3129797 - 2⁴ = 3129781 is a prime.

It is a super-2 number, since 2×3129797² = 19591258522418, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3129797.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3129799) 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, 142253 + ... + 142274.

It is an arithmetic number, because the mean of its divisors is an integer number (853584).

Almost surely, 2^3129797 is an apocalyptic number.

It is an amenable number.

3129797 is a deficient number, since it is larger than the sum of its proper divisors (284539).

3129797 is a wasteful number, since it uses less digits than its factorization.

3129797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284538.

The product of its digits is 23814, while the sum is 38.

The square root of 3129797 is about 1769.1232291731. The cubic root of 3129797 is about 146.2756567353.

The spelling of 3129797 in words is "three million, one hundred twenty-nine thousand, seven hundred ninety-seven".