16749397 has 16 divisors (see below), whose sum is σ = 19740672. Its totient is φ = 13915440.

The previous prime is 16749389. The next prime is 16749401. The reversal of 16749397 is 79394761.

It is not a de Polignac number, because 16749397 - 2³ = 16749389 is a prime.

Its product of digits (285768) is a multiple of the sum of its prime divisors (648).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16749347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33048 + ... + 33550.

It is an arithmetic number, because the mean of its divisors is an integer number (1233792).

Almost surely, 2^16749397 is an apocalyptic number.

It is an amenable number.

16749397 is a deficient number, since it is larger than the sum of its proper divisors (2991275).

16749397 is an equidigital number, since it uses as much as digits as its factorization.

16749397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648.

The product of its digits is 285768, while the sum is 46.

The square root of 16749397 is about 4092.6027170983. The cubic root of 16749397 is about 255.8584269708.

The spelling of 16749397 in words is "sixteen million, seven hundred forty-nine thousand, three hundred ninety-seven".