16900729 has 4 divisors (see below), whose sum is σ = 16915876. Its totient is φ = 16885584.

The previous prime is 16900691. The next prime is 16900739. The reversal of 16900729 is 92700961.

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 9734400 + 7166329 = 3120^2 + 2677^2 .

It is a cyclic number.

It is not a de Polignac number, because 16900729 - 2²¹ = 14803577 is a prime.

It is a super-3 number, since 3×16900729³ (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 = 16900694 and 16900703.

It is not an unprimeable number, because it can be changed into a prime (16900739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5754 + ... + 8179.

It is an arithmetic number, because the mean of its divisors is an integer number (4228969).

Almost surely, 2^16900729 is an apocalyptic number.

It is an amenable number.

16900729 is a deficient number, since it is larger than the sum of its proper divisors (15147).

16900729 is a wasteful number, since it uses less digits than its factorization.

16900729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15146.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 16900729 is about 4111.0496226633. The cubic root of 16900729 is about 256.6266842389.

It can be divided in two parts, 16900 and 729, that multiplied together give a square (12320100 = 3510²).

The spelling of 16900729 in words is "sixteen million, nine hundred thousand, seven hundred twenty-nine".