1798631 has 2 divisors, whose sum is σ = 1798632. Its totient is φ = 1798630.

The previous prime is 1798619. The next prime is 1798633. The reversal of 1798631 is 1368971.

It is a strong prime.

It is an emirp because it is prime and its reverse (1368971) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1798631 - 2¹⁸ = 1536487 is a prime.

It is a super-2 number, since 2×1798631² = 6470146948322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 1798633, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1798591 and 1798600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1798633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 899315 + 899316.

It is an arithmetic number, because the mean of its divisors is an integer number (899316).

2^1798631 is an apocalyptic number.

1798631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1798631 is an equidigital number, since it uses as much as digits as its factorization.

1798631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 1798631 is about 1341.1304932780. The cubic root of 1798631 is about 121.6131930731.

The spelling of 1798631 in words is "one million, seven hundred ninety-eight thousand, six hundred thirty-one".