3191397 has 16 divisors (see below), whose sum is σ = 4694592. Its totient is φ = 1912320.

The previous prime is 3191389. The next prime is 3191407. The reversal of 3191397 is 7931913.

It is not a de Polignac number, because 3191397 - 2³ = 3191389 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

3191397 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3191327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2703 + ... + 3699.

It is an arithmetic number, because the mean of its divisors is an integer number (293412).

Almost surely, 2^3191397 is an apocalyptic number.

It is an amenable number.

3191397 is a deficient number, since it is larger than the sum of its proper divisors (1503195).

3191397 is a wasteful number, since it uses less digits than its factorization.

3191397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108.

The product of its digits is 5103, while the sum is 33.

The square root of 3191397 is about 1786.4481520604. The cubic root of 3191397 is about 147.2290842470.

The spelling of 3191397 in words is "three million, one hundred ninety-one thousand, three hundred ninety-seven".