1970887 has 4 divisors (see below), whose sum is σ = 2034496. Its totient is φ = 1907280.

The previous prime is 1970873. The next prime is 1970921. The reversal of 1970887 is 7880791.

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-1970887 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1970867) 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 3 ways as a sum of consecutive naturals, for example, 31758 + ... + 31819.

It is an arithmetic number, because the mean of its divisors is an integer number (508624).

2^1970887 is an apocalyptic number.

1970887 is a deficient number, since it is larger than the sum of its proper divisors (63609).

1970887 is an equidigital number, since it uses as much as digits as its factorization.

1970887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63608.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 1970887 is about 1403.8828298686. The cubic root of 1970887 is about 125.3777797760.

The spelling of 1970887 in words is "one million, nine hundred seventy thousand, eight hundred eighty-seven".