3091431 has 8 divisors (see below), whose sum is σ = 4710784. Its totient is φ = 1766520.

The previous prime is 3091427. The next prime is 3091457. The reversal of 3091431 is 1341903.

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

It is not a de Polignac number, because 3091431 - 2² = 3091427 is a prime.

It is a super-2 number, since 2×3091431² = 19113891255522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 147211 = 3091431 / (3 + 0 + 9 + 1 + 4 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3091398 and 3091407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3091421) 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, 73585 + ... + 73626.

It is an arithmetic number, because the mean of its divisors is an integer number (588848).

Almost surely, 2^3091431 is an apocalyptic number.

3091431 is a deficient number, since it is larger than the sum of its proper divisors (1619353).

3091431 is a wasteful number, since it uses less digits than its factorization.

3091431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147221.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 3091431 is about 1758.2465697393. The cubic root of 3091431 is about 145.6755006073.

The spelling of 3091431 in words is "three million, ninety-one thousand, four hundred thirty-one".