16458949 has 4 divisors (see below), whose sum is σ = 17725036. Its totient is φ = 15192864.

The previous prime is 16458947. The next prime is 16458973. The reversal of 16458949 is 94985461.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1014049 + 15444900 = 1007^2 + 3930^2 .

It is a cyclic number.

It is not a de Polignac number, because 16458949 - 2¹ = 16458947 is a prime.

It is a super-3 number, since 3×16458949³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16458899 and 16458908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16458943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 633024 + ... + 633049.

It is an arithmetic number, because the mean of its divisors is an integer number (4431259).

Almost surely, 2^16458949 is an apocalyptic number.

It is an amenable number.

16458949 is a deficient number, since it is larger than the sum of its proper divisors (1266087).

16458949 is a wasteful number, since it uses less digits than its factorization.

16458949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1266086.

The product of its digits is 311040, while the sum is 46.

The square root of 16458949 is about 4056.9630266987. The cubic root of 16458949 is about 254.3708648137.

The spelling of 16458949 in words is "sixteen million, four hundred fifty-eight thousand, nine hundred forty-nine".