1930987 has 4 divisors (see below), whose sum is σ = 1958256. Its totient is φ = 1903720.

The previous prime is 1930969. The next prime is 1931009. The reversal of 1930987 is 7890391.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1930987 is a prime.

It is a Duffinian number.

1930987 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1930927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13528 + ... + 13669.

It is an arithmetic number, because the mean of its divisors is an integer number (489564).

2^1930987 is an apocalyptic number.

1930987 is a deficient number, since it is larger than the sum of its proper divisors (27269).

1930987 is an equidigital number, since it uses as much as digits as its factorization.

1930987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27268.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1930987 is about 1389.5995826136. The cubic root of 1930987 is about 124.5259269778.

The spelling of 1930987 in words is "one million, nine hundred thirty thousand, nine hundred eighty-seven".