16497009 has 6 divisors (see below), whose sum is σ = 23829026. Its totient is φ = 10998000.

The previous prime is 16497001. The next prime is 16497029. The reversal of 16497009 is 90079461.

16497009 is a `hidden beast` number, since 1 + 649 + 7 + 0 + 0 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 15681600 + 815409 = 3960^2 + 903^2 .

It is not a de Polignac number, because 16497009 - 2³ = 16497001 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (16497001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 916492 + ... + 916509.

Almost surely, 2^16497009 is an apocalyptic number.

It is an amenable number.

16497009 is a deficient number, since it is larger than the sum of its proper divisors (7332017).

16497009 is a wasteful number, since it uses less digits than its factorization.

16497009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1833007 (or 1833004 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 16497009 is about 4061.6510189823. The cubic root of 16497009 is about 254.5667846187.

It can be divided in two parts, 16 and 497009, that added together give a square (497025 = 705²).

The spelling of 16497009 in words is "sixteen million, four hundred ninety-seven thousand, nine".