16426729 has 4 divisors (see below), whose sum is σ = 17920080. Its totient is φ = 14933380.

The previous prime is 16426727. The next prime is 16426757. The reversal of 16426729 is 92762461.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92762461 = 11 ⋅8432951.

It is not a de Polignac number, because 16426729 - 2¹ = 16426727 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16426723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 746659 + ... + 746680.

It is an arithmetic number, because the mean of its divisors is an integer number (4480020).

Almost surely, 2^16426729 is an apocalyptic number.

It is an amenable number.

16426729 is a deficient number, since it is larger than the sum of its proper divisors (1493351).

16426729 is a wasteful number, since it uses less digits than its factorization.

16426729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493350.

The product of its digits is 36288, while the sum is 37.

The square root of 16426729 is about 4052.9901307553. The cubic root of 16426729 is about 254.2047711153.

The spelling of 16426729 in words is "sixteen million, four hundred twenty-six thousand, seven hundred twenty-nine".