6491431 has 4 divisors (see below), whose sum is σ = 6700864. Its totient is φ = 6282000.

The previous prime is 6491417. The next prime is 6491449. The reversal of 6491431 is 1341946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6491431 is a prime.

It is a super-2 number, since 2×6491431² = 84277352855522, 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 6491431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6491411) 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, 104670 + ... + 104731.

It is an arithmetic number, because the mean of its divisors is an integer number (1675216).

Almost surely, 2^6491431 is an apocalyptic number.

6491431 is a deficient number, since it is larger than the sum of its proper divisors (209433).

6491431 is a wasteful number, since it uses less digits than its factorization.

6491431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209432.

The product of its digits is 2592, while the sum is 28.

The square root of 6491431 is about 2547.8286834087. The cubic root of 6491431 is about 186.5435118068.

It can be divided in two parts, 649 and 1431, that added together give a triangular number (2080 = T₆₄).

The spelling of 6491431 in words is "six million, four hundred ninety-one thousand, four hundred thirty-one".