1679221667831 has 2 divisors, whose sum is σ = 1679221667832. Its totient is φ = 1679221667830.

The previous prime is 1679221667791. The next prime is 1679221667833. The reversal of 1679221667831 is 1387661229761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1679221667831 - 2¹⁴ = 1679221651447 is a prime.

It is a super-2 number, since 2×1679221667831² (a number of 25 digits) contains 22 as substring.

Together with 1679221667833, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1679221667833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 839610833915 + 839610833916.

It is an arithmetic number, because the mean of its divisors is an integer number (839610833916).

Almost surely, 2^{1679221667831} is an apocalyptic number.

1679221667831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1679221667831 is an equidigital number, since it uses as much as digits as its factorization.

1679221667831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9144576, while the sum is 59.

The spelling of 1679221667831 in words is "one trillion, six hundred seventy-nine billion, two hundred twenty-one million, six hundred sixty-seven thousand, eight hundred thirty-one".