1673216887 has 4 divisors (see below), whose sum is σ = 1688854536. Its totient is φ = 1657579240.

The previous prime is 1673216863. The next prime is 1673216947. The reversal of 1673216887 is 7886123761.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1673216887 - 2¹⁵ = 1673184119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1673216887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1673216827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7818664 + ... + 7818877.

It is an arithmetic number, because the mean of its divisors is an integer number (422213634).

Almost surely, 2^1673216887 is an apocalyptic number.

1673216887 is a deficient number, since it is larger than the sum of its proper divisors (15637649).

1673216887 is a wasteful number, since it uses less digits than its factorization.

1673216887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15637648.

The product of its digits is 677376, while the sum is 49.

The square root of 1673216887 is about 40904.9738662672. The cubic root of 1673216887 is about 1187.1823001192.

The spelling of 1673216887 in words is "one billion, six hundred seventy-three million, two hundred sixteen thousand, eight hundred eighty-seven".