16477985 has 4 divisors (see below), whose sum is σ = 19773588. Its totient is φ = 13182384.

The previous prime is 16477973. The next prime is 16478009. The reversal of 16477985 is 58977461.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58977461 = 2663 ⋅22147.

It can be written as a sum of positive squares in 2 ways, for example, as 12222016 + 4255969 = 3496^2 + 2063^2 .

It is a cyclic number.

It is not a de Polignac number, because 16477985 - 2¹² = 16473889 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1647794 + ... + 1647803.

It is an arithmetic number, because the mean of its divisors is an integer number (4943397).

Almost surely, 2^16477985 is an apocalyptic number.

It is an amenable number.

16477985 is a deficient number, since it is larger than the sum of its proper divisors (3295603).

16477985 is an equidigital number, since it uses as much as digits as its factorization.

16477985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3295602.

The product of its digits is 423360, while the sum is 47.

The square root of 16477985 is about 4059.3084386383. The cubic root of 16477985 is about 254.4688933126.

The spelling of 16477985 in words is "sixteen million, four hundred seventy-seven thousand, nine hundred eighty-five".