1872631 has 2 divisors, whose sum is σ = 1872632. Its totient is φ = 1872630.

The previous prime is 1872623. The next prime is 1872667. The reversal of 1872631 is 1362781.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1872631 - 2³ = 1872623 is a prime.

It is a super-2 number, since 2×1872631² = 7013493724322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1872631.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1872671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 936315 + 936316.

It is an arithmetic number, because the mean of its divisors is an integer number (936316).

2^1872631 is an apocalyptic number.

1872631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1872631 is an equidigital number, since it uses as much as digits as its factorization.

1872631 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 28.

The square root of 1872631 is about 1368.4410838615. The cubic root of 1872631 is about 123.2586488835.

The spelling of 1872631 in words is "one million, eight hundred seventy-two thousand, six hundred thirty-one".