16629749 has 4 divisors (see below), whose sum is σ = 16731936. Its totient is φ = 16527564.

The previous prime is 16629727. The next prime is 16629763. The reversal of 16629749 is 94792661.

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.

It is a cyclic number.

It is not a de Polignac number, because 16629749 - 2²⁰ = 15581173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16629449) 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, 50849 + ... + 51174.

It is an arithmetic number, because the mean of its divisors is an integer number (4182984).

Almost surely, 2^16629749 is an apocalyptic number.

It is an amenable number.

16629749 is a deficient number, since it is larger than the sum of its proper divisors (102187).

16629749 is a wasteful number, since it uses less digits than its factorization.

16629749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102186.

The product of its digits is 163296, while the sum is 44.

The square root of 16629749 is about 4077.9589257372. The cubic root of 16629749 is about 255.2477356631.

It can be divided in two parts, 1662 and 9749, that added together give a palindrome (11411).

The spelling of 16629749 in words is "sixteen million, six hundred twenty-nine thousand, seven hundred forty-nine".