3123391 has 8 divisors (see below), whose sum is σ = 3365120. Its totient is φ = 2889432.

The previous prime is 3123349. The next prime is 3123403. The reversal of 3123391 is 1933213.

3123391 = 719² + 720² + ... + 724².

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

It is a cyclic number.

It is not a de Polignac number, because 3123391 - 2⁹ = 3122879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123091) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1095 + ... + 2728.

It is an arithmetic number, because the mean of its divisors is an integer number (420640).

Almost surely, 2^3123391 is an apocalyptic number.

3123391 is a deficient number, since it is larger than the sum of its proper divisors (241729).

3123391 is a wasteful number, since it uses less digits than its factorization.

3123391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885.

The product of its digits is 486, while the sum is 22.

The square root of 3123391 is about 1767.3118004472. The cubic root of 3123391 is about 146.1757906321.

The spelling of 3123391 in words is "three million, one hundred twenty-three thousand, three hundred ninety-one".