1491679 has 4 divisors (see below), whose sum is σ = 1704784. Its totient is φ = 1278576.

The previous prime is 1491667. The next prime is 1491683. The reversal of 1491679 is 9761941.

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

It is a cyclic number.

It is not a de Polignac number, because 1491679 - 2¹⁵ = 1458911 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 (1491629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 106542 + ... + 106555.

It is an arithmetic number, because the mean of its divisors is an integer number (426196).

2^1491679 is an apocalyptic number.

1491679 is a deficient number, since it is larger than the sum of its proper divisors (213105).

1491679 is an equidigital number, since it uses as much as digits as its factorization.

1491679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213104.

The product of its digits is 13608, while the sum is 37.

The square root of 1491679 is about 1221.3431131341. The cubic root of 1491679 is about 114.2593612601.

The spelling of 1491679 in words is "one million, four hundred ninety-one thousand, six hundred seventy-nine".