16929121 has 4 divisors (see below), whose sum is σ = 18468144. Its totient is φ = 15390100.

The previous prime is 16929109. The next prime is 16929137. The reversal of 16929121 is 12192961.

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 not a de Polignac number, because 16929121 - 2⁷ = 16928993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16929151) 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, 769495 + ... + 769516.

It is an arithmetic number, because the mean of its divisors is an integer number (4617036).

Almost surely, 2^16929121 is an apocalyptic number.

16929121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16929121 is a deficient number, since it is larger than the sum of its proper divisors (1539023).

16929121 is a wasteful number, since it uses less digits than its factorization.

16929121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539022.

The product of its digits is 1944, while the sum is 31.

The square root of 16929121 is about 4114.5013063554. The cubic root of 16929121 is about 256.7703085870.

It can be divided in two parts, 169291 and 21, that multiplied together give a triangular number (3555111 = T₂₆₆₆).

The spelling of 16929121 in words is "sixteen million, nine hundred twenty-nine thousand, one hundred twenty-one".