1987757714 has 4 divisors (see below), whose sum is σ = 2981636574. Its totient is φ = 993878856.

The previous prime is 1987757711. The next prime is 1987757729. The reversal of 1987757714 is 4177577891.

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

It can be written as a sum of positive squares in only one way, i.e., 1015378225 + 972379489 = 31865^2 + 31183^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1987757714.

It is not an unprimeable number, because it can be changed into a prime (1987757711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 496939427 + ... + 496939430.

Almost surely, 2^1987757714 is an apocalyptic number.

1987757714 is a deficient number, since it is larger than the sum of its proper divisors (993878860).

1987757714 is an equidigital number, since it uses as much as digits as its factorization.

1987757714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993878859.

The product of its digits is 3457440, while the sum is 56.

The square root of 1987757714 is about 44584.2765333251. The cubic root of 1987757714 is about 1257.3450677667.

The spelling of 1987757714 in words is "one billion, nine hundred eighty-seven million, seven hundred fifty-seven thousand, seven hundred fourteen".