672621541 has 4 divisors (see below), whose sum is σ = 712187532. Its totient is φ = 633055552.

The previous prime is 672621529. The next prime is 672621583. The reversal of 672621541 is 145126276.

672621541 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 495997441 + 176624100 = 22271^2 + 13290^2 .

It is a cyclic number.

It is not a de Polignac number, because 672621541 - 2⁹ = 672621029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 672621497 and 672621506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (672601541) 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, 19782970 + ... + 19783003.

It is an arithmetic number, because the mean of its divisors is an integer number (178046883).

Almost surely, 2^672621541 is an apocalyptic number.

It is an amenable number.

672621541 is a deficient number, since it is larger than the sum of its proper divisors (39565991).

672621541 is a wasteful number, since it uses less digits than its factorization.

672621541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39565990.

The product of its digits is 20160, while the sum is 34.

The square root of 672621541 is about 25934.9482552019. The cubic root of 672621541 is about 876.1737894773.

The spelling of 672621541 in words is "six hundred seventy-two million, six hundred twenty-one thousand, five hundred forty-one".