931087 has 2 divisors, whose sum is σ = 931088. Its totient is φ = 931086.

The previous prime is 931067. The next prime is 931097. The reversal of 931087 is 780139.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 931087 - 2¹⁵ = 898319 is a prime.

It is a Chen prime.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (931067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 465543 + 465544.

It is an arithmetic number, because the mean of its divisors is an integer number (465544).

2⁹³¹⁰⁸⁷ is an apocalyptic number.

931087 is a deficient number, since it is larger than the sum of its proper divisors (1).

931087 is an equidigital number, since it uses as much as digits as its factorization.

931087 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 28.

The square root of 931087 is about 964.9284947601. The cubic root of 931087 is about 97.6480153761.

The spelling of 931087 in words is "nine hundred thirty-one thousand, eighty-seven".