672001929 has 9 divisors (see below), whose sum is σ = 970781799. Its totient is φ = 447949440.

The previous prime is 672001907. The next prime is 672001933. The reversal of 672001929 is 929100276.

The square root of 672001929 is 25923.

It is a perfect power (a square), and thus also a powerful number.

672001929 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 18688329 + 653313600 = 4323^2 + 25560^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 672001929 - 2⁹ = 672001417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 672001893 and 672001902.

It is not an unprimeable number, because it can be changed into a prime (672001129) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 73449 + ... + 82089.

Almost surely, 2^672001929 is an apocalyptic number.

672001929 is the 25923-rd square number.

672001929 is the 12962-nd centered octagonal number.

It is an amenable number.

672001929 is a deficient number, since it is larger than the sum of its proper divisors (298779870).

672001929 is an frugal number, since it uses more digits than its factorization.

672001929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17288 (or 8644 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The cubic root of 672001929 is about 875.9046660812.

Multiplying 672001929 by its sum of digits (36), we get a square (24192069444 = 155538²).

The spelling of 672001929 in words is "six hundred seventy-two million, one thousand, nine hundred twenty-nine".