6491739 has 8 divisors (see below), whose sum is σ = 9164880. Its totient is φ = 4073216.

The previous prime is 6491731. The next prime is 6491747. The reversal of 6491739 is 9371946.

6491739 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (6491731) and next prime (6491747).

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 6491739 - 2³ = 6491731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6491697 and 6491706.

It is not an unprimeable number, because it can be changed into a prime (6491731) 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, 63594 + ... + 63695.

It is an arithmetic number, because the mean of its divisors is an integer number (1145610).

Almost surely, 2^6491739 is an apocalyptic number.

6491739 is a deficient number, since it is larger than the sum of its proper divisors (2673141).

6491739 is a wasteful number, since it uses less digits than its factorization.

6491739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127309.

The product of its digits is 40824, while the sum is 39.

The square root of 6491739 is about 2547.8891263161. The cubic root of 6491739 is about 186.5464620804.

The spelling of 6491739 in words is "six million, four hundred ninety-one thousand, seven hundred thirty-nine".