1670831 has 2 divisors, whose sum is σ = 1670832. Its totient is φ = 1670830.

The previous prime is 1670827. The next prime is 1670833. The reversal of 1670831 is 1380761.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1670831 - 2² = 1670827 is a prime.

It is a super-2 number, since 2×1670831² = 5583352461122, which contains 22 as substring.

Together with 1670833, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1670831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1670833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835415 + 835416.

It is an arithmetic number, because the mean of its divisors is an integer number (835416).

2^1670831 is an apocalyptic number.

1670831 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670831 is an equidigital number, since it uses as much as digits as its factorization.

1670831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1670831 is about 1292.6062818972. The cubic root of 1670831 is about 118.6617752827.

The spelling of 1670831 in words is "one million, six hundred seventy thousand, eight hundred thirty-one".