1087931 has 8 divisors (see below), whose sum is σ = 1194480. Its totient is φ = 984672.

The previous prime is 1087907. The next prime is 1087937. The reversal of 1087931 is 1397801.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-1087931 is a prime.

It is a super-2 number, since 2×1087931² = 2367187721522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1087894 and 1087903.

It is not an unprimeable number, because it can be changed into a prime (1087937) 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 in 7 ways as a sum of consecutive naturals, for example, 101 + ... + 1478.

It is an arithmetic number, because the mean of its divisors is an integer number (149310).

2^1087931 is an apocalyptic number.

1087931 is a deficient number, since it is larger than the sum of its proper divisors (106549).

1087931 is a wasteful number, since it uses less digits than its factorization.

1087931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645.

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

The square root of 1087931 is about 1043.0393089429. The cubic root of 1087931 is about 102.8490893349.

The spelling of 1087931 in words is "one million, eighty-seven thousand, nine hundred thirty-one".