1987031 has 2 divisors, whose sum is σ = 1987032. Its totient is φ = 1987030.

The previous prime is 1987003. The next prime is 1987043. The reversal of 1987031 is 1307891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1987031 - 2⁶ = 1986967 is a prime.

It is a super-2 number, since 2×1987031² = 7896584389922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 1986985 and 1987003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1987081) 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, 993515 + 993516.

It is an arithmetic number, because the mean of its divisors is an integer number (993516).

2^1987031 is an apocalyptic number.

1987031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1987031 is an equidigital number, since it uses as much as digits as its factorization.

1987031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 1987031 is about 1409.6208710146. The cubic root of 1987031 is about 125.7191822793.

The spelling of 1987031 in words is "one million, nine hundred eighty-seven thousand, thirty-one".