16410981 has 4 divisors (see below), whose sum is σ = 21881312. Its totient is φ = 10940652.

The previous prime is 16410959. The next prime is 16410991. The reversal of 16410981 is 18901461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16410981 - 2⁵ = 16410949 is a prime.

It is a super-2 number, since 2×16410981² = 538640594764722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16410991) 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, 2735161 + ... + 2735166.

It is an arithmetic number, because the mean of its divisors is an integer number (5470328).

Almost surely, 2^16410981 is an apocalyptic number.

It is an amenable number.

16410981 is a deficient number, since it is larger than the sum of its proper divisors (5470331).

16410981 is an equidigital number, since it uses as much as digits as its factorization.

16410981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5470330.

The product of its (nonzero) digits is 1728, while the sum is 30.

The square root of 16410981 is about 4051.0469017280. The cubic root of 16410981 is about 254.1235113448.

It can be divided in two parts, 16410 and 981, that added together give a triangular number (17391 = T₁₈₆).

The spelling of 16410981 in words is "sixteen million, four hundred ten thousand, nine hundred eighty-one".