16473721 has 8 divisors (see below), whose sum is σ = 18266688. Its totient is φ = 14730000.

The previous prime is 16473719. The next prime is 16473733. The reversal of 16473721 is 12737461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16473721 - 2¹ = 16473719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16473701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11605 + ... + 12946.

It is an arithmetic number, because the mean of its divisors is an integer number (2283336).

Almost surely, 2^16473721 is an apocalyptic number.

16473721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16473721 is a deficient number, since it is larger than the sum of its proper divisors (1792967).

16473721 is a wasteful number, since it uses less digits than its factorization.

16473721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24623.

The product of its digits is 7056, while the sum is 31.

The square root of 16473721 is about 4058.7831920417. The cubic root of 16473721 is about 254.4469418227.

It can be divided in two parts, 1647 and 3721, that multiplied together give a cube (6128487 = 183³).

The spelling of 16473721 in words is "sixteen million, four hundred seventy-three thousand, seven hundred twenty-one".