1679631 has 4 divisors (see below), whose sum is σ = 2239512. Its totient is φ = 1119752.

The previous prime is 1679627. The next prime is 1679633. The reversal of 1679631 is 1369761.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1369761 = 3 ⋅456587.

It is a cyclic number.

It is not a de Polignac number, because 1679631 - 2² = 1679627 is a prime.

It is a super-2 number, since 2×1679631² = 5642320592322, which contains 22 as substring.

It is an Ulam number.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 1679592 and 1679601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1679633) 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, 279936 + ... + 279941.

It is an arithmetic number, because the mean of its divisors is an integer number (559878).

2^1679631 is an apocalyptic number.

1679631 is a deficient number, since it is larger than the sum of its proper divisors (559881).

1679631 is an equidigital number, since it uses as much as digits as its factorization.

1679631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559880.

The product of its digits is 6804, while the sum is 33.

The square root of 1679631 is about 1296.0057870241. The cubic root of 1679631 is about 118.8697348180.

The spelling of 1679631 in words is "one million, six hundred seventy-nine thousand, six hundred thirty-one".