16348981 has 4 divisors (see below), whose sum is σ = 17835264. Its totient is φ = 14862700.

The previous prime is 16348979. The next prime is 16349017. The reversal of 16348981 is 18984361.

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 a cyclic number.

It is not a de Polignac number, because 16348981 - 2¹ = 16348979 is a prime.

It is a super-2 number, since 2×16348981² = 534578359476722, 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 (16348481) 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, 743125 + ... + 743146.

It is an arithmetic number, because the mean of its divisors is an integer number (4458816).

Almost surely, 2^16348981 is an apocalyptic number.

16348981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16348981 is a deficient number, since it is larger than the sum of its proper divisors (1486283).

16348981 is a wasteful number, since it uses less digits than its factorization.

16348981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486282.

The product of its digits is 41472, while the sum is 40.

The square root of 16348981 is about 4043.3873175841. The cubic root of 16348981 is about 253.8030848195.

The spelling of 16348981 in words is "sixteen million, three hundred forty-eight thousand, nine hundred eighty-one".