16900271987 has 4 divisors (see below), whose sum is σ = 16900680720. Its totient is φ = 16899863256.

The previous prime is 16900271963. The next prime is 16900272001. The reversal of 16900271987 is 78917200961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78917200961 = 145177 ⋅543593.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16900271987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16900271587) 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, 134348 + ... + 227705.

It is an arithmetic number, because the mean of its divisors is an integer number (4225170180).

Almost surely, 2^16900271987 is an apocalyptic number.

16900271987 is a deficient number, since it is larger than the sum of its proper divisors (408733).

16900271987 is an equidigital number, since it uses as much as digits as its factorization.

16900271987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408732.

The product of its (nonzero) digits is 381024, while the sum is 50.

The spelling of 16900271987 in words is "sixteen billion, nine hundred million, two hundred seventy-one thousand, nine hundred eighty-seven".