1687490611 has 8 divisors (see below), whose sum is σ = 1817662464. Its totient is φ = 1562052360.

The previous prime is 1687490591. The next prime is 1687490621. The reversal of 1687490611 is 1160947861.

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-1687490611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1687490621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1182661 + ... + 1184086.

It is an arithmetic number, because the mean of its divisors is an integer number (227207808).

Almost surely, 2^1687490611 is an apocalyptic number.

1687490611 is a deficient number, since it is larger than the sum of its proper divisors (130171853).

1687490611 is a wasteful number, since it uses less digits than its factorization.

1687490611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2366801.

The product of its (nonzero) digits is 72576, while the sum is 43.

The square root of 1687490611 is about 41079.0775334598. The cubic root of 1687490611 is about 1190.5485809560.

The spelling of 1687490611 in words is "one billion, six hundred eighty-seven million, four hundred ninety thousand, six hundred eleven".