16987031 has 4 divisors (see below), whose sum is σ = 17081064. Its totient is φ = 16893000.

The previous prime is 16987001. The next prime is 16987049. The reversal of 16987031 is 13078961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13078961 = 7 ⋅1868423.

It is a cyclic number.

It is not a de Polignac number, because 16987031 - 2¹⁴ = 16970647 is a prime.

It is a super-2 number, since 2×16987031² = 577118444389922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16986982 and 16987000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16987001) 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, 46745 + ... + 47106.

It is an arithmetic number, because the mean of its divisors is an integer number (4270266).

Almost surely, 2^16987031 is an apocalyptic number.

16987031 is a deficient number, since it is larger than the sum of its proper divisors (94033).

16987031 is an equidigital number, since it uses as much as digits as its factorization.

16987031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94032.

The product of its (nonzero) digits is 9072, while the sum is 35.

The square root of 16987031 is about 4121.5326032921. The cubic root of 16987031 is about 257.0627562531.

The spelling of 16987031 in words is "sixteen million, nine hundred eighty-seven thousand, thirty-one".