1683631 has 2 divisors, whose sum is σ = 1683632. Its totient is φ = 1683630.

The previous prime is 1683601. The next prime is 1683637. The reversal of 1683631 is 1363861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1683631 - 2⁷ = 1683503 is a prime.

It is a super-2 number, since 2×1683631² = 5669226688322, which contains 22 as substring.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1683631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1683637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 841815 + 841816.

It is an arithmetic number, because the mean of its divisors is an integer number (841816).

2^1683631 is an apocalyptic number.

1683631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1683631 is an equidigital number, since it uses as much as digits as its factorization.

1683631 is an evil number, because the sum of its binary digits is even.

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

The square root of 1683631 is about 1297.5480723272. The cubic root of 1683631 is about 118.9640217954.

The spelling of 1683631 in words is "one million, six hundred eighty-three thousand, six hundred thirty-one".