1679491 has 4 divisors (see below), whose sum is σ = 1832184. Its totient is φ = 1526800.

The previous prime is 1679479. The next prime is 1679501. The reversal of 1679491 is 1949761.

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

It is not a de Polignac number, because 1679491 - 2⁵ = 1679459 is a prime.

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 1679491.

It is not an unprimeable number, because it can be changed into a prime (1679471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76330 + ... + 76351.

It is an arithmetic number, because the mean of its divisors is an integer number (458046).

2^1679491 is an apocalyptic number.

1679491 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1679491 is a deficient number, since it is larger than the sum of its proper divisors (152693).

1679491 is a wasteful number, since it uses less digits than its factorization.

1679491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152692.

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

The square root of 1679491 is about 1295.9517737941. The cubic root of 1679491 is about 118.8664320637.

It can be divided in two parts, 16 and 79491, that added together give a cube (79507 = 43³).

The spelling of 1679491 in words is "one million, six hundred seventy-nine thousand, four hundred ninety-one".